Top 10 Best LED Grow Lights for Growing Cannabis

top 10, best led grow light, cannabis, led, weed, marijuana, growroom, grow tent, grow op

Now that growing cannabis is legal and/or regulated in many states, the market is growing for efficient and effective equipment for growing marijuana. LED Grow lights may be relatively new on the scene for growing cannabis, but they are quickly growing in popularity because they are so energy efficient, are easy to use and set up, and can be used for the full life cycle of your cannabis plants.

Why LED? LED’s produce much more light per watt than fluorescent or HID lighting. This also means that they run cooler, reducing electricity costs as well as the risk of fire in your grow room. Most LED grow lights come with small fans built in, and do not require additional ventilation except in special circumstances. Another bonus is that they do not require ballasts. Overall, they return much higher yields for lower levels of electricity consumed.

Any experienced marijuana grower knows what a pain it can be to set up a new grow room when you have HID lighting. HID lights and ballasts are heavy and require a lot of support to hang, and they reduce in brightness every year so they have to be replaced often. LED grow lights remain highly efficient for many years, reducing the need to spend time and money on replacements.

Watch a video about growing weed with LEDs here.

Choosing the Right LEDs: Usually LED lights are described in terms of the equivalent wattage you would need in a HID or HPS light to produce the same results. For example, when you see a LED grow light listed as “300W” it means that you can use it as a replacement for a 300W grow light, even though the actual wattage may be as little as 140W on the LED. Less heat means you save money in the long run on electricity to power the light as well as your ventilation systems.

When calculating the wattage required for your grow op, it is easiest to use the advertised wattage. The minimum amount you want per square foot is 30W, while the optimal range is between 50W and 80W. For example, if you have a 3’ x 3’ grow tent, you have nine square feet of grow space. Nine multiplied by 50 watts per square foot means you will need at least 450W of LED lighting. You can accomplish this either by purchasing a 450W or greater light, or by daisy chaining multiple smaller lights together.

This list contains our favorite LED grow lights for marijuana growers, with the specific needs of cannabis plants in mind. The list is organized by brand, so  you will need to use the calculations above to decide which wattage is right for your grow room. Make sure to follow all local laws in your area when shopping for and using the following pieces of hardware.

Watch a video on buying the right LEDs for your grow op here.

1. Advanced Platinum P-Series LED Grow Lights

advanced platinum, led grow light, cannabis, 150w, 300w, 450w, 600w, 900w, 1200w, best led grow light, marijuana, weed, cannabis

Advanced Platinum is a huge brand in LED lighting. They produce high quality, reliable and powerful lights and back them up with a five year warranty and 90 day money back guarantee. Their LED lights come in sizes ranging from 150W to 1200W, and they can easily be daisy chained for complete customization of your lighting. Advanced Platinum uses platinum LEDs, offering the highest lumen output per watt of any LED grow light.

These lights are advertised as offering two to three times the intensity in lumens as other LED grow lights. Advanced Platinum lights also offer a complete 12 band spectrum that ranges from Ultraviolet to Infared, with an easy to control Veg/Flower switch so you can easily adjust your lighting to your plants growth cycle. Each light comes with super quiet fans as well as aluminium cooling heat sinks to reduce your need for fans even further.

Advanced Platinum grow lights come in six sizes: 150W, 300W, 450W, 600W, 900W or 1200W.

Price: $230 to $1,299 depending on size, with free shipping

Buy the Advanced Platinum P-Series here.

Watch a review of the Advanced Platinum P450 model here.


  • Superior 12 band spectrum for all growth stages
  • 5 year warranty guaranteed and 90 day money back guarantee
  • Recently updated aluminium heat sinks
  • Includes built in fans
  • Two to three times the lumen output of other LED lights
  • USA-made LEDs


  • Not a true full spectrum
  • May require additional reflective surfaces on walls or around lights for full foliage coverage
  • Must purchase hangers separately

Find more Advanced Platinum information and reviews here.

2. GalaxyHydro LED Grow Lights

galaxyhydro, led grow light, cannabis, best grow light marijuana, 300w, 600w

GalaxyHydro has been in business making LED grow lights for over half a decade, and are well known for their excellent products and customer service. Their lights provide the full spectrum needed for both vegetative and flowering stages of growth. They are lightweight and easy to install and can be daisy chained together if you want to expand the size of your grow op. They also have incredibly efficient heat dissipation, with multiple small fans built in to each light. Each light comes with a two year warranty and 30 day money back guarantee. These lights are very durable as well, with a lifespan of 50,000 hours.

GalaxyHydro manufactures LED grow lights in three sizes. Their smallest light is 54W (available individually or in packs of two), which consists of a line of 14 red and four blue LEDs on an adjustable bracket. This size is usually used for growing vegetables and greens, but can be used for extra small cannabis grow ops such as grow cabinets as well.

GalaxyHydro’s most popular light for growing cannabis is their 300W model (#1 Best Seller on Amazon). They also sell a 600W model for larger grows.

Price: $40 to $160 depending on size, with free shipping

Buy the GalaxyHydro 54W Light here, the 300W Light here or the 600W Light here.

Watch an unboxing and review of a GalaxyHydro 165W light here.


  • Comes with a 2 year warranty
  • Comes with an auto timer for easy scheduling
  • Very bright light compared with other LEDs
  • 300W light is a #1 best seller on amazon


  • Indoor only, cannot be used outdoors
  • No manual off switch, timer only
  • Some reviewers mention lower output than advertised

Find more GalaxyHydro LED Grow Light information and reviews here.

Top 5 Best LED Grow Lights Under $100

Growing marijuana on a budget? These top 5 LED lights under $100 will help jumpstart your small grow op.

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3. Mars Hydro Reflector Series LED Grow Lights

mars hydrro, grow light, reflector, led grow light, cannabis, hydroponics, weed, marijuana

The Mars Hydro Reflector Series of LED grow lights is very unique and unlike other LED grow lights on this list. Keep in mind that these lights are named in terms of their number of LED and true wattage, not their HID equivalent. Mars Hydro is a reliable LED manufacturer with over seven years of experience and lots of great reviews for these and other grow lights on The Reflector Series uses a unique design of compact reflectors around each individual LED for a high PAR output that is unmatched in regular LED lights. This also means more energy savings for you, because they do not require as many bulbs for the same output. Each light has a full spectrum of lighting including blue, red and white for both vegetative and flowering stages of growth. Mars Hydro prides themselves on their customer service, with a US-based service center and orders shipped within 24 hours.

The Reflector Series includes four LED grow lights: 48 LEDs at 102W(replaces 150W HID), 96 LEDs and 207W (replaces 250W HPS), 144 LEDs at 317W= (equal to a 350W HPS), and 192 LEDs at 410W (equivalent to 450W HPS).

Price: $190 to $349 depending on size, with free shipping

Buy the Mars Hydro Reflector 48 here,the Reflector 96 here, Reflector 144 here, or the Reflector 192 here.

Watch a set up and wattage test for the Mars Hydro Reflector 144 here.


  • Modular, lights can be combined in any combination you want
  • Constructed of the best quality LEDs
  • Innovative reflectors provide more coverage
  • Reviewers noted this light is much brighter than the competitiion


  • Does not include UV or IR lights
  • More expensive than some other options
  • Only 90 day warranty

Find more Mars Hydro Reflector Series information and reviews here.

Top 5 Best LED Grow Lights Under $500

Are you a mid sized grower looking for an energy efficient light? Check out these LED grow lights under $500.

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4. King Plus Double Chip LED Grow Lights

 King Plus 1200w Double Chips Full Specturm Led Grow Light for Greenhouse and Indoor Plant Flowering Growing (10w Leds) (1200W) , hydroponic led grow light, cannabis, marijuana

King PLus LED grow lights use an innovative new type of LED technology in order to achieve brighter output for your plants and less energy consumption. Their double LED chips consist of two 5W LEDs for a total of 10W per LED. This is much brighter and more efficient than individual thee, five or six watt LEDs that you find in most grow lights. King plus lights provide a full spectrum of red, blue, yellow, white, IR and UV light. This gives them a closer match to natural sunlight. For better heat dissipation, the LED board and the cover glass have a few holes in them and there are fans included as well. These lights are all guaranteed by a three year warranty and King Plus guarantees customer service responses within 24 hours.

King Plus lights come in four sizes for different sized grow ops: 600W, 800W, 1000W and 1200W. Each of these sizes can be purchased at the link below.

Price: $119 to $185 depending on size, with free shipping

Buy the King Plus Double Chip LED Grow Lights here.

Watch a video of a grow op using King Plus LEDs here.


  • 10W LEDs consume less energy for a greater light output
  • Full spectrum lighting with red blue, yellow, white, IR and UV
  • Double LED lights mean more efficiency and greater light coverage
  • Thicker case, ventilated glass cover and fans included for better heat dissipation
  • Three year warranty and excellent cover service


  • Some reviewers noted smaller than advertised light coverage area
  • May burn leaves if hung too close to plants
  • Multiple units cannot be daisy chained together

Find more King Plus Double Chip LED Grow Lights information and reviews here.

How to Choose a CO2 Regulator for Your Cannabis Grow Op

Growing cannabis? You need a CO2 regulator! This one simple thing can make a huge difference in how much weed you harvest at the end of a growing cycle.

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5. Roleadro Chip On Board (COB) LED Grow Lights

Roleadro Chip On Board (COB) LED Grow Lights, hydroponic cannabis, marijuana

Here is a truly unique series of LED grow lights from Roleadro. Chip On Board, or COB, is a new and innovative technology in LED lighting. In this type of light, multiple LED chips are connected together into one light module, giving the appearance of a panel of light instead of a single diode. COB lights can increase the lighting area by 10 times, as well as decreasing glare. For hydroponic growers, this means more light coverage for less electricity cost and less heat output.

Roleadro COB lights also have a reflective cup around each panel, for more heat radiation and even greater lumen output. Roleadro lights are designed to be modular, with each COB emitting 200W. The lights come in 200W, 400W, 800W, 1200W and even 1600W sizes and can all be daisy chained together interchangeably for a truly unique lighting system. For example, if you wanted a 600W equivalent light you could either purchase three 200W lights or one 200W and one 400W and daisy chain them together in your grow room. The system can always grow or shrink with your needs. Each light comes with all of the hanging equipment, power cords and built in fans to set them up and start using them right away.

Price: $75 to $1,348 depending on size, with free shipping

Buy the Roleadro 200W COB Light here, the 400W COB Light here, the 800W COB Light here, the 1200W COB Light here or the 1600W COB Light here.

Watch a video about Chip on Board LED technology here.


  • Innovative Chip On Board LEDS have a higher lumen output than regular LEDs
  • COB panels are surrounded by individual reflective hoods for greater lighting area and heat dissipation
  • Innovative design allows for daisy chaining and custom lighting solutions


  • Not truly full spectrum
  • Larger lights are very expensive
  • No warranty

Find more Roleadro LED Grow Lights information and reviews here.

The Best Temperature & Humidity Controllers for Growing Cannabis

Get the most out of your hydroponics grow operation by customizing and automating your grow room's temperature, humidity and CO2 levels using a master environmental controller.

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6. Apollo Horticulture GL-Series LED Grow Lights

 Apollo Horticulture GL60LED Full Spectrum 180W LED Grow Light for Plant Growing, cannabis, marijuana, weed, hydroponics, 75W, 135W, 180W, 300W, 400W, 600W, 700W, 1200W

Apollo Horticulture offers LED grow lights for cannabis growers of all experience levels and grow ops of all sizes. They offer nine different sized LED lights, ranging from 75W to 1200W. The smallest sizes are UFO shaped for small grow cabinets or tents, while the larger sizes – 300W and up – are rectangular shaped. For a truly custom lighting system you can calculate the exact wattage you need and daisy chain different sized lights together in your grow room.

Each light comes with built in fans to reduce your need for added ventilation, and reviewers have noted that the fans run quietly and work very well. Their bigger lights do of course have more fans inside of the case than the smaller fans. Each light also comes with a stainless steel hanging kit, power cord, two year warranty and a lifespan of 50,000 hours. These lights are suitable for all stages of plant growth, from vegetative to flowering.

Each of their nine lights is located on the same web page, so click the link below for more information or to buy any of the following light sizes: 180W, 300W, 400W, 600W, 700W

Price: $71 to $400 depending on size, with free shipping

Buy the Apollo Horticulture GL-Series LED Grow Lights here.

Watch a review of the Apollo 180W UFO Light from video here.


  • Built in fan means no additional ventilation needed
  • Comes in sizes ranging from 75W to 1200W
  • Not as expensive as other options


  • Light is truly full spectrum
  • Some reviewers had issues with bulbs burning out prematurely
  • Some reviewers noted poor packaging during shipping or item arrived damaged

Find more Apollo Horticulture information and reviews here.

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7. Morsen LED Grow Lights

 Morsen 1200W Led Grow Light Full Spectrum Panel Lamp 200X6W Led Chip for Hydroponics Indoor Medical Plants Veg Flower Bloom , best led grow light, cannabis, marijuana

If you are a serious grower who needs professional-quality lighting for a larger than average grow op, you are going to need some high powered lights for the job. Most LED grow lights range in size from less than 100W HPS equivalent to around 1,000W. Morsen LED lights are larger, more powerful and well suited to bigger grow rooms. Morsen LED grow lights come in multiple sizes: 900W, 1000W, 1200W, 1600W, and 1800W, 2000W and 2400W.. With this many options, there is definitely a Morsen light to fit your grow room.

Morsen’s 2400W model is one of the largest LED grow lights on the market today. It consists of 180 individual 10W LEDs, while the smaller models use individual 6W LEDs. Each light includes red, blue, orange, white, infared and ultraviolet LEDs for a full spectrum of the light your plants need in all stages of growth. The actual power consumption of these lights is about 25% of what an equivalent HPS or HID light would consume, which you will save a lot of money in the long run especially with a larger sized grow room.

Price: $190 to $360 depending on size, with free shipping

Buy the Morsen LED 1200W Grow Light here, the 1600W Grow Light here or the 2400W Grow Light here.

Watch a review video of a previous model Morsen LED grow light here.


  • Light output is full spectrum
  • Morsen uses higher output LEDs than other brands (6W and 10W
  • Extremely energy efficient
  • Comes in larger sizes for big grow ops
  • Relatively inexpensive for such high quality and power level


  • Does not have an easy switch for vegetative and flowering stages
  • Larger and bulkier than other options
  • Does not come in smaller sizes

Find more Morsen LED Grow Lights information and reviews here.

Top 10 Best Inline Fans for Cannabis Grow Rooms

Inline fans are a crucial piece of equipment for hydroponic cannabis growers. Here are the top 10 brands and products for hydroponic ventilation systems.

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8. Nova LED 300W Grow Light

 Ultimate LED Grow Light - Nova N300 Ultra Efficient Full Spectrum Grow Lamp - Best For Indoor Plants - 5 Year Warranty ,  LED GROW LIGHT, CANNABIS, MARIJUANA

Nova is a California based company and all of their lights come with a 5 year warranty. Nova LED has come out with a really nice 300W grow light that definitely stands up to the competition. Thy currently do not offer any sizes other than 300W, but for a mid sized grow op this light could be a perfect fit. Also, you can daisy chain multiple 300W lights together for larger grow rooms. The N300 uses a combination of LEDs to emit combined angles of 90 and 120 degrees, which allows you to install these lights closer to the plants than some other manufacturers models. There are 100 LEDs total and they emit a 12 band spectrum, incorporating both red and blue as well as UV and Infared lights. It also includes three quiet-running fans that reduce the need for ventilation in your grow room.

The thing that sets the Nova LED apart from the rest is that they offer three versions of the 300W light, each with different features. The most basic, and least expensive, is Nova N300 with no custom features. One step up is Nova Switch N300S, which includes an easy access button that allows you to easily switch between vegetative and flowering stages of growth. Finally, the Super Nova SN300 is their professional growers light. It includes veg and bloom switches like the N300S, as well as the addition of a secondary reflective lens on each bulb. This increases the PAR output significantly, giving you more light coverage for the same wattage.

Price: $100 to $140 depending on model, with free shipping

Buy the Nova LED 300W Grow Light here.

Watch a review of a smaller model Nova LED here.


  • 5 year warranty
  • Easy to use daisy chain hanging system
  • Can be installed closer to the plants than the competition
  • Super Nova model has added reflective lenses on each LED for greater PAR output


  • Reviewers complained of slow shipping
  • Some reviewers noted a smaller light footprint in their grow op than advertised
  • Does not come with full instructions

Find more Nova LED information and reviews here.

Top 5 Best Hydroponic Watering Systems for Growing Cannabis

Looking for an easy solution for watering and feeding your marijuana plants? All in one watering systems are the answer!

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9. ViparSpectra Reflector-Series LED Grow Lights

 VIPARSPECTRA Reflector-Series 300W LED Grow Light Full Spectrum for Indoor Plants Veg and Flower , 450w, 600w, 900w, 1200w, cannabis, marijuana, grow light, hydroponics

ViparSpectra’s Reflector Series of LED grow lights is an excellent collection of grow lights that range from 300W to 900W. These lights are well designed and look great, and come with all of the features you would expect from a top quality grow light. They include a mix of red, blue and Infared LEDs for all stages of plant growth. Each light has two switches to turn on and off the appropriate set of LEDs for vegetative or flowering growth stages. The LEDs run cool and the lights also have 4.72″ fans and large aluminum cooling heat sinks for dissipating any excess heat. They come with all of the necessary hanging equipment, and reviewers have noted that these lights are very well balanced and easy to hang. These grow lights are extremely durable and well made, and they come with a three year warranty as well as a 30 day money back guarantee. Many reviewers appreciated the powder coated black finish of these lights, as well as the quiet running fans, and the reflective coating around each LED that increases the PAR output of the lights significantly.

You can choose from five different sizes,: 300W (Max coverage 3×3′,#1 best seller on amazon), 450W (Max coverage 3.5×3.5′), 600W (Max coverage 4×4′), 900W (Max coverage 4.5×4.5′), or 1200W(Max coverage 5×5′).

Price: $89 to $399 depending on size, with free shipping

Buy the ViparSpectra Reflector-Series 300W LED Grow Light here, the 450W here, the 600W here, the 900W here or the 1200W here.


  • 3 year warranty
  • Very well built and rugged design
  • Reflective coating surrounding LEDs increases PAR value with no extra energy consumption
  • Has internal fans


  • Reviewers complained of slow shipping
  • Some reviewers noted a smaller light footprint in their grow op than advertised
  • Some reviewers received damaged units

Find more VIPARSPECTRA Reflector-Series LED Grow Light information and reviews here.

Top 5 Best Hydroponic Systems for Growing Cannabis

You can't go wrong with one of these all in one marijuana growing systems. They allow you to set up a hydroponic cannabis grow op easily and inexpensively in your own home.

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10. G8LED LED Grow Lights

g8led grow light, cannabis, led, marijuana, weed

G8LED is a well established company that has been manufacturing LED grow lights for over eight years. They offer lights in four sizes – 240W, 450W, 600W and 900W – and each one has a life span of 50,000 hours or around 15 years. LED lights mean no more replacing burnt out bulbs, worn out ballasts, or exhausted inline fans. G8LED was awarded High Times Magazine’s “Best LED Grow Light” award in 2016 and in 2014. These lights use an optimal eight band wavelength ratio and include UV and IR lights as well. These lights stay extremely cool, even after continuous use for 24 hours or more.

These lights are configured in parallel with modular parts so you do not have to worry about a system outage due to a problem with individual diodes. The LEDs are all made in the USA. Reviewers love these lights and note the extremely high quality plant growth and high yields that they achieve when compared with other manufacturers. Each light comes with a two year warranty and US-based customer service.

The 240W light can cover a max area of six square feet, while the 450W light can cover at least 12 square feet. The 600W model covers an area of 18 square feet. You can increase your yields even more by adding a 90W red UFO light in addition to the G8LED. Their largest sized light at 900W covers an area of 24 square feet or a six by four grow room.

Price: $310 to $1,100 depending on size, with free shipping

Buy the G8LED 240W LED Grow Light here, the 450W Grow Light here, the 600W light here or the 900W Grow Light here.

Watch a review of the 450W model here.


  • 2 year warranty
  • Modular design prevents system wide outages
  • Greater square foot covergae than other brands
  • Award winning LED grow lights won High Times Magazine’s “Best LED Grow Light” in 2014 and 2016


  • More expensive than some other options
  • Very popular so they go out of stock quickly
  • Does not have as many sizes of lights as other brands

Find more G8LED information and reviews here.

Top 10 Best Grow Tents for Growing Cannabis

If you are looking to start a hydro cannabis garden in your house or apartment, check out these grow tents for maximum efficiency and yields!

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Heavy, Inc. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by linking to Amazon. Our product recommendations are guided solely by our editors. We have no relationship with manufacturers.

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  1. In my opinion, here is an awesome lightI In my grow area my temperatures were about 85 plus with CFL side light on my crops. I added 2 of these P150 LED lights from Platinum LED. And my area averages 75 degs with the removal of the CFLS. I strongly recommended these lights if you are a growing anything indoors.

  2. I have a Blackstar 135 watt and loved that a lot so I bought version 2.0. I strongly recommend using Lighthouse Hydro and Gotham Hydroponics. The quality is great for the price.

  3. Spectrum King vs the competition. (Magnum 357 and Diamond XPS 150)

    Let me start by saying that I really like the Spectrum King. It’s sealed, and has no fan or moving parts. This is a huge plus for anyone who needs their grow to be quiet for stealth (or just because you don’t like noise.) It’s also cleanable with water, which could be a huge plus. Not dust or resin inside. And also no bugs inside! The Spectrum King also has a very pleasant light. It looks like sunlight to the eye, and feels like sunlight on the hand. I liked the promo material/videos for this light enough that I bought it new from the manufacturer. The other two lights I purchased used. If I had to sit in a grow space all day, the Spectrum King would be the light I would want to be used. The other lights, particularly the Magnum, are very funky to look at, hard on the eyes, and make assessing plant condition more difficult.

    Let me first point out flaws I am aware of in the testing methods used.

    – First, each light got a sample size of one. Though clones from the same mother, genetic abnormality could be at play here. From a statistics stand point, this might be the most significant flaw in the test. However, the throw of all three lights is not sufficient to flower a larger surface area than I used in my SCROG. Each light did approximately 6-7 sq feet, with some overlap. (see below)
    – Second, all three plants were grown on the same screen, in an industrial rack that is slightly larger than 6’ by 2’. The SCROG growth ended up being about 3 feet wide and 7 feet long, as the plants tend to hang out of the defined space. This should have given the Spectrum King a slight advantage, as it was the middle light. Each of the end plants got their assigned light, plus a bit of bleed from the Spectrum King. But the middle plant got the full Spectrum King, and bleed over from lights on BOTH sides.
    – Third, the Spectrum King was 4” higher (22 inches vs 18) than the other two lights, as measured from the glass. The inverse square law indicates that it will of course have somewhat diminished power if further away. However, I placed the lights at the manufacturer’s recommended minimum distance, and the Spectrum King has the highest rated light wattage (and highest draw at the wall.) My e-mail requests for clarification of the height measurement (glass vs LEDs) were unanswered by Spectrum King on installation, so I measured to the glass. Measuring to the LEDs would be difficult due to the shape of the housing. In the interest of fairness, I lowered the Spectrum King slightly to 22” vs 24”
    – Fourth, the Spectrum King was new out of the box, the Diamond was used, but the “current” version, and the Magnum was used, but one version behind. (Should have been another advantage for Spectrum King.)
    – Fifth, it is possible that the Spectrum King could flower a larger area if raised up (thus getting more bang for your buck), whereas the Magnum and Diamond clearly would not. But, the manual for the Spectrum King indicates a flower illumination of about the size I used at the specified height.

    Those are the only significant flaws I am aware of. All other conditions were identical. Thus, even if the conditions weren’t ideal, they were uniformly not ideal and should have provided a good baseline for testing the lights.

    I will also mention that the spectrum king has all 200+ LEDs in a puck about 4” square, vs the other two lights having their lights spread out over a much larger surface area. It seems that that would make it brighter in the middle, dimmer on the edges, and cause it to cast more shadows; perhaps not giving as uniform of illumination as the other two lights. However, there was no noticeable difference in bud formation or plant height over the entire area of illumination, so it seems the reflector is doing its job very well. Additionally, at ground level, the Spectrum King was the only light making significant penetration to the soil, and even to the floor below. It is entirely possible that SCROG is the kind of grow least suited for Spectrum King, and that it would/will do better in a regular vertical grow.

    I will not claim to be a pro, as this is only my 5th grow, but I have a very green thumb. Spent my youth farming, and manage to very successfully grow more than 100 species of plants in my yard in California. I get plants.

    Summary: In my grow, the Spectrum King just wasn’t cost effective. Not only was the Spectrum King the most expensive to operate in terms of power consumption, it had the highest MSRP and produced the lowest yield in my test. (Your growing style/technique may yield different results) I was hoping for superior results, but could have lived with just equal results because of the light’s other advantages. This was a huge disappointment for a light I really wanted to love. (Because I do spend a lot of time in my grow room, and hate the purple light the other lights put out.)

    All wattages were measured at the wall (using a Kill-a-watt meter), and bud weights are dried and trimmed.
    The Magnum 357, drawing 334 watts, produced 210 grams of dried/trimmed bud. (0.63 grams/watt)
    The Spectrum King 400, drawing 491 watts, produced 175 grams. (0.36 grams/watt)
    The Diamond XML 150, drawing 148 watts, produced 220 grams. (1.49 grams/watt)

    The huge surprise here was the almost 1.5 grams/watt produced by the inexpensive and low power Diamond XML 150. In addition to being the most cost efficient, the diamond also has two dimmer switches, allowing the greatest versatility in light output. It runs amazingly quite compared to other LED lights I’ve used as well.

    We did not weigh the trim from each plant separately, but we got about 170 grams of sugar leaf trim combined (dry weight). That’s a total weight of 775 grams (27 oz / 1.7 lbs). So, an average of half a pound per plant. I’m pretty happy with that.

    A last note about SpectrumKing. Bigger than the disappointment in my grow was how SpectrumKing treated me when I asked to return the light. Their sales lead (yes, Brendan from the on-line videos) said my claims were unbelievable, and when presented with my grow log and final weights, simply stopped answering my e-mails. Diamond offers a 90 day risk free guarantee, which is long enough to flower plants and see how the light performs, and a 3 year warrantee. SpectrumKing, on the other hand, says they want you to be “completely satisfied with your purchase” yet offer only a 30 day return window, which of course is not enough time to see how it handles a grow. I was outside the 30 day window (obviously) by the time I harvested, and didn’t necessarily expect them to take the light back. However, their rudeness came as a bit of a shock, and they clearly don’t really care if I’m satisfied or not. It’s great to be proud of your product, it’s not so great to turn a blind eye to any information contrary to what you’d like to believe.

    • I’ve become a bit cynical every time I read reviews. I immediately think “company shill” anytime I see positive reviews on anything. Paranoia aside, I really appreciate that you took the time to post this. It was a great read. You seemed to proved a fairly worded and detailed account of your experience. I’m hoping to start a veggie and herb garden indoors. After having already purchased an hid light, my wife is starting to express concern over the fire risk. I’ve just started researching and came across this article. Anyway, just wanted to express my enjoyment, thanks.

  4. 5 best…give lighthouse’s Ion 8 a try if you really want a light that performs. Been growing with led for a decade now(went through many garbage lights) and have tried many of the major brands. This light is a beast of beasts and will not only match a 1000w hid but massacre it. And it will do so in weight, flowering time and overall quality. This is the light to use if you want an led that will out preform your hid.

    • I have a GalaxyHydro 180W LED Grow Light. I strongly recommend using it because it cover an area of 8-9 square feet . The quality is great for the price. Thanks

    • Buy 2 lighthouse hydro ion 8s 426 W UVB+resin horticulture bulb…you can get them for 600 each at some sites.. look on ebay and a company sells on their for 650e but if you go to their site up save 50$ so 600 a piece …….I’ve done A LOT OF RESEARCH AND HAVE 1 AND A 1000TH HID THAT I CAN’T WAIT TO REPLACE WITH A 1546W ION8!!!!!#

    • go to they have a great light and man do they give you just what you need. ive used their lights for my garden for 7 years now and they still work like i just bought them.

  5. hi there…i would like to ask..if i can grow cannabis under normal home led light 80 watt(red and blue) unfortunately there no grow light sold in my country..thank u.

  6. Hello,
    I encourage anyone to look into a new LED grow light on the market called Go Grow LED ( They use a single 500W chip that smaller 3W and 5W chips cannot match no matter how many hundreds they use. The results are much better than any other LED out there right now.

    • I would also say that the Platinum would be a good cheap option for a very small indoor grow, but if you’re looking for a bigger set up you would want a grow light that covers a larger surface.

  7. I used 4 900 w G8’s and 5 90 all red first time pulled 3 lbs on autos, it was primo taste, quality, yield. And did not tell anyone , abour autos, they could not tell the diff? Adding gavita pro 2 and scrog the whole damn thing. Pa pow

  8. Keep herb plants trimmed and bushy. By consistently pruning your herb plants you will create a shorter path for nutrients and allow the leaves to grow fuller and quicker. Keep the plants short through trimming as well and increase the density of the leaves. When at all possible do not allow the herbs to flower.

  9. Have you really tried growing plants using led grow lights???if yes have they shown desired results

  10. COB Grow Lights is the best place to get LEDs that work at a good price. They have a cUL listed version soon Scorpion COB. Phone about it though to be sure.

    • I have tried a Roleadro 400W COB Full Spectrum LED Grow Light which bought on amazon, very nice. The plants grow nice and dense, they love this light. If I had more money I would have two of these in my flower tent, which is 20x36x63. COBs are way.

  11. I guess there is too much info…i just want to know if i was gonna grow just two plants in a walkin closet, just exactly would you get if growing autoflowering..the more i read the more questions and confusion i jsut tell me straight..something economical also, not 900 dollars..thanks in advancd

  12. Some high quality bullshit not even mentioning heliospectra.

    It may not be the most bang for the buck, but in the more expensive class there is no comparison and that is why they are winning every led growth price out there atm.

    If someone want to start growing big scale, heliospectra is what you would want.

  13. You are so awesome! I do not suppose I’ve truly read through anything like that before.
    So nice to find another person with a few original thoughts on this issue.
    Really.. thank you for starting this up. This web site is something that is required on the web, someone with a little originality!

  14. Ms. D’Anna,
    I am new to growing in my home and need advise from an expert. I will be growing three plants at a time in a small closet. I will be using auto-flowering feminized seeds. Which of the above lights would be best for my situation.

    Thank you in advance

  15. Actually, with some ingenuity, one could built their own LED grow lights, and in various forms. If one were to build a 12VDC system, for LED’s that operate on 12VDC, solar power can be adapted to this to cut utility costs even more. Much of this can be DIY and it depends upon your resourcefulness.

  16. Mars Hydro reflectors do have IR leds in them. The dim red looking diodes are the IR. For you all that do not know Mars Hydro also makes the Apollo lights and tents for Apollo. Not only does Mars Hydro sale there lights they are a manufacturer. Not like some little company that orders lights from China and sales them as there own like a company called platinum leds and many others.


  18. This is an awesome article for the Indoor gardener who are looking for the best led grow lights.Led grow lights are really essential now a days.
    Many people are doing indoor garden in their apartments where sun light is not available.Led grow lights are the main source of light to them.