TOP 25 BEST LED GROW LIGHTS 2020

Best LED Grow Lights 2020 List High Times

List of the best LED grow lights 2020. Ordered by the top reviewed best LED grow lights for weed, best LED grow lights under $500, $200, $100 and best COB LED grow lights.

Best LED Grow Lights for Cannabis 2020

Spider Farmer SF-4000 LED Grow Light

Spider Farmer SF-4000 LED Grow Light Samsung Chips Meanwell Driver: The #1 Best LED Light for Cannabis in 2020

Overview: Harness the power of intense LED light using highly-efficient Samsung LM301B LEDs, some of the best LEDs on the market. The huge Spider Farmer SF-4000 LED grow light contains 1,212 evenly-spaced LEDs powered by a dimmable Meanwell driver. Sunlight spectrum (Blue, White, Red & IR). The aluminum board fixture stays cool without the need for fans which helps for power savings. Rubber coating reduces the risk of water damage. Suitable for the entire growing process from veg to flower. A high-quality, plug-and-play LED grow light for weed at an affordable price.

True Power Draw~456 watts
LED TypeSamsung LM301B Diodes
PAR Test (PPFD)1320 µmol/m²/s at 18 inches
Light Coverage1x SF-4000 per 25-36 ft² (2.3-3.3 m²)

MARS HYDRO TS 3000W LED Grow Light

Top Best LED Grow Lights for Weed: MARS HYDRO TS 3000W

Overview: A massive 1016 pcs. LED grow light by MARS HYDRO, the TS 3000W is a powerful full spectrum wideband LED grow light made to imitate natural sunlight. Enjoy the benefits of wideband IR lighting at an economical price. Producing a very high PAR output while only pulling 450 watts from the wall, the TS 3000W is a super bright LED grow light for veg and flowering that runs quiet & cool without any onboard fans. The new SMD LEDs are highly efficient and provide great light spread in the grow room or grow tent.

True Power Draw~450 watts
LED Type1016pcs LEDs Epistar SMD Chips
PAR Test (PPFD)1095 µmol/m²/s at 18 inches
Light Coverage1x TS 3000W per 20 ft² (2.3 m²)

Electric Sky 300 V2 Wideband LED Grow Light

Electric Sky 300 V2 Wideband LED Grow Light Top 25 Best LED Grow Lights for Weed

Overview: One of the top best-selling LED grow lights for marijuana growing is the popular ES300, or Electric Sky 300. Built with the company’s unique wideband LEDs, the full spectrum light emitted gives solid canopy penetration combined with the specialized linear optics which allow for wider coverage. The new version 2 model is brighter than ever before. The Electric Sky 300 V2 stays cool and operates without fans. Plug-in the grow light to see for yourself how this super-bright wideband spectrum works wonders for cannabis plants. Read our full ES300 review for more information.

True Power Draw~300 watts
LED TypeGS1 Wideband Spectrum LEDs
PAR Test (PPFD)1036 µmol/m²/s at 18 inches
Light Coverage1x ES300 per 21 ft² (2 m²) max

HLG 550 V2 Quantum Board LED Grow Light

HLG-550 V2 Quantum Board Top 25 Best LED Grow Lights

Overview: Highly efficient “Quantum Boards” coined by Horticulture Lighting Group are the latest trend in LED grow light technology for cannabis growers. These very capable LED grow lights are made of a high number of unique mid-power LEDs strung together in parallel configurations on a board with a high-powered current driver. Quantum board LED grow lights run cool and spread light uniformly. The HLG 550 V2 touts 1,152 Top-Bin Samsung LM301B LED’s, which produces over 1178 PPF at only 480 watts (avg. power draw).

True Power Draw~480 watts
LED TypeSamsung LM301B LEDs
PAR Test (PPFD)1400 µmol/m²/s at 18 inches
Light Coverage1x HLG 550 per 16 ft² (1.5m²)

MARS HYDRO SP 250 LED Grow Light

Mars Hydro SP LED Grow Light: Long, Brightest LED Best for Weed Growing in 2020

Overview: Another new grow light from MARS HYDRO, the SP 250 uses the cutting-edge SMD LED technology to provide the highest par/lumen output per watt possible. Ultraviolet and infrared light bulbs are incorporated alongside the Epistar SMD chips to create the full spectrum sunlight-like light output. The no-fan design keeps the SP 250 cool while conserving energy. The quantum light board is covered by glue for water resistance. Adjustable Meanwell driver. No veg or bloom switch, the sunlight spectrum is suitable for growing cannabis from seed until harvest.

True Power Draw~230 watts
LED Type684pcs LEDs Epistar SMD Chips
PAR Test (PPFD)925 µmol/m²/s at 18 inches
Light Coverage1x SP 250 per 8 ft² (0.7 m²)

Best LED Grow Lights Under $500

Spider Farmer SF-2000 LED Grow Light

Spider Farmer SF-2000 LED Grow Light Samsung Chips LM301B and Meanwell Driver Great for Marijuana Growing

Overview: A bit smaller than the big SF-4000, the Spider Farmer SF-2000 LED grow light uses the same high-output Samsung LM301B Diodes to create a highly-penetrating full spectrum “sunlight” light to maximize yields per watt. Super efficient on energy, 2.7 umol/J while only consuming 202 watts of power. Zero noise with no fans, the aluminum heat sink provides the passive heat dissipation. Waterproof LED board and protective covers for cables. Plug & play design. One of the best LED grow lights for the money in 2020.

True Power Draw~202 watts
LED TypeSamsung LM301B Diodes
PAR Test (PPFD)1054 µmol/m²/s at 18 inches
Light Coverage1x SF-2000 per 8-12 ft² (0.7-1.1 m²)

MARS HYDRO Reflector 960W LED Grow Light

MARS HYDRO Reflector 960W LED Grow Light Best Full-Spectrum

Overview: A reliable high-powered LED grow light for a cheap price, MARS HYDRO Reflector 960W LED grow light uses unique reflecting blades to produce refractory light beams to better spread the light coverage. Plug and play, the fixture is equipped with two on-board fans for cooling. The MARS HYDRO company is represented around growing forums and produce some of the best cheap LED grow lights for growing weed on a budget.

True Power Draw~374/410 watts
LED Type192 pcs. Epistar 5 watt chip LEDs
PAR Test (PPFD)1200 µmol/m²/s at 18 inches
Light Coverage1x Reflector 960W per 16 ft² (1.5 m²)

Advanced Platinum Series P300 LED Grow Light

Advanced Platinum Series Top 25 Best LED Grow Lights

Overview: The best-selling LED grow light from the Advanced Platinum Series catalog, the P300, contains the full 12 band spectrum of extremely bright light from UV to IR. The P300 comes at a cheaper price tag than the bigger models while roughly comparing to the PAR output of a 400W HID. Separate veg and flower settings. LEDs made in the USA. Uses the equipped fans to keep cool.

True Power Draw~80 watts
LED Type100pcs 3 watt LEDs
PAR Test (PPFD)1050 µmol/m²/s at 18 inches
Light Coverage1x P300 per 17 ft² (1.6 m²)

G8LED 240 Watt LED Grow Light

G8LED 240 Watt LED Grow Light Top-Rated Veg-Flower Good

Overview: The G8LED 240 watt is the lowest-priced model in the award-winning lineup of G8LED 8-band full spectrum LED grow lights. The company prefers the 8-band wavelength for the highest yield per unit of energy consumed. G8LEDs don’t use a veg/flower switch, but recommend to optionally supplement their 90W Reds for a flowering boost without wasting any LED power.

True Power Draw~140 watts
LED Type8-Band + IR & UV, 3W LEDs
PAR Test (PPFD)890 µmol/m²/s at 12 inches
Light Coverage1x G8LED 240W per 6 ft² (0.6 m²)

BESTVA 2000W Full Spectrum Dual-Chip LED Grow Light

BESTVA 2000W Full Spectrum Dual-Chip LED Grow Light

Overview: Part of the company’s Dual-Chip series of LED grow lights, the BESTVA 2000W Dual-Chip is made using two-hundred 10 watt LEDs, producing a full spectrum that ranges from IR to UV. 4 fans are built into the fixture as well as holes punched into the board for cooling. For the price, the BESTVA 2000W is one of the best grow lights for weed plants.

True Power Draw~390 watts
LED Type200pcs Dual-Chip 10W Bridgelux/Epileds LEDs
PAR Test (PPFD)1058 µmol/m²/s at 12 inches
Light Coverage1x BESTVA 2000W per 16 ft² (1.5 m²)

Best LED Grow Lights Under $200

King Plus 1500W Double-Chips LED Grow Light

King Plus 1500W Double-Chips LED Grow Light Great Full-Spectrum

Overview: For just over 100 dollars this LED grow light gives you a full spectrum output with UV & IR, enough light for any grow room area sized up to 12 square feet. The King Plus 1500W Double-Chips LED grow light has one-hundred 10 watt LEDs built in with board holes and fans for cooling. This super bright LED grow light is a good choice for beginner growers short on cash.

True Power Draw~240 watts
LED Type100pcs 10W Epistar LEDs
PAR Test (PPFD)958 µmol/m²/s at 12 inches
Light Coverage1x King Plus 1500W per 12.9 ft² (1.2 m²)

HLG 100 Quantum Board LED Grow Light

Quantum Board LED Grow Light Horticulture Lighting Group 100

Overview: Experience the power of Quantum Boards cheap with the HLG 100 Quantum Board LED grow light. Incredibly efficient, the 192 Samsung LM561C S6 LEDs connected only use a total of 96 watts while producing over 15K Lumens of PAR. Horticulture Lighting Group is on the cutting edge of LED technology with their quantum board technology, prevalent in the cannabis growing community this year for the high efficiency and high yields the lights produce.

True Power Draw~96 watts
LED Type192pcs Samsung LM561C S6 LEDs
PAR Test (PPFD)640 µmol/m²/s at 12 inches
Light Coverage1x HLG 100 per 9 ft² (0.8 m²)

VIPARSPECTRA Reflector-Series 600W LED Grow Light

VIPARSPECTRA Reflector-Series 600W LED Grow Light Best-Reviewed

Overview: Full of positive reviews from happy pot growers, the VIPARSPECTRA Reflector-Series 600W LED Grow Light contains 120 5 watt LED emitter diodes that together emit an optimized veg and flowering spectrum at the flip of a switch. Two quiet fans and aluminum cooling heat sinks help with cooling and heat dissipation. VIPARSPECTRA LED grow lights are designed by experienced indoor growers. You can buy the VIPARSPECTRA Reflector-Series 600W LED grow light for a bargain low-price, which offers considerable savings compared to a 600 watt HPS/MH grow light.

True Power Draw~260 watts
LED Type120pcs 5W Bridgelux/Epileds LEDs
PAR Test (PPFD)820 µmol/m²/s at 18 inches
Light Coverage1x Reflector 600W per 9 ft² max

BESTVA 1000W Full Spectrum Dual-Chip LED Grow Light

BESTVA 1000W LED Grow Light Full Spectrum Dual-Chip Good Price

Overview: BESTVA LED grow lights are popular with weed growers for their high lumen PAR optimized output and super affordable price. On top of this, the BESTVA company is highly-reviewed for their excellent customer support. The BESTVA 1000W Full Spectrum Dual-Chip LED Grow Light is built with one-hundred 10W double-chip LEDs that give a wide spread of core coverage area of full spectrum light, all for just over a hundred dollars.

True Power Draw185 watts
LED Type100pcs Dual-Chip 10W Bridgelux/Epileds LEDs
PAR Test (PPFD)958 µmol/m²/s at 12 inches
Light Coverage1x BESTVA 1000W per 13.8 ft² (1.3 m²)

Yehsence 1500W LED Grow Light

Yehsence 1500w LED Grow Light Full Spectrum Cheap Veg Bloom

Overview: A great deal priced at a little over one-hundred bucks, the Yehsence 1500w LED Grow Light gives you the most PAR light for a large growing area compared to other cheap LED grow lights. The grow light contains 150pcs of triple-chip LEDs – that’s 3x 5 watt Bridgelux LEDS in every bulb. The daisy-chain design allows you to hook together multiple lights on to the same system. Veg and Bloom switch for changing the spectrum, or just turn both switches on for maximum power. With tons of good reviews from satisfied growers, the Yehsence 1500w may be the best LED grow light you can get in the low-price range.

True Power Draw~265 watts
LED Type150pcs triple chip 15 watt LEDs
PAR Test (PPFD)1317 µmol/m²/s at 12 inches
Light Coverage1x Yehsence 1500w per 29 ft² (2.7 m²)

Cheapest LED Grow Lights (Under $100)

HLG 65 V2 Quantum Board LED Grow Light

HLG 65 V2 4000K Quantum Board LED Grow Light: Low-Price Best for Marijuana Growing

Overview: The HLG 65 V2 is the second version of the entry-level quantum board LED grow light sold by Horticulture Lighting Group. Featuring a 4000K daylight full spectrum light produced by high-quality LM301B LED’s, this fixture is ideal for veg and flowering in compact areas. Diffused light for better canopy penetration. Passive-cooled design without fans. The HLG 65 V2 puts out 10,000 Lumens while only using 65 watts of power. Comparable to a 150W metal halide grow light.

True Power Draw~65 watts
LED Type120 pcs Samsung LM301B LEDs
PAR Test (PPFD)480 µmol/m²/s at 12 inches
Light Coverage1x HLG 65 V2 per 3-4 ft² (~0.3 m²)

MARS HYDRO TS 600W LED Grow Light

MARS HYDRO TS 600W: Cheapest Best LED Grow Light for Cannabis Growing in 2020

Overview: A best selling LED grow light in the fifty-dollar to one-hundred dollar range is the new MARS HYDRO TS 600W LED Grow Light. This compact but powerful LED grow light uses the state-of-the-art Epistar SMD LED chips that gives supreme PAR/LUMEN output to maximize the yield per wattage. The TS 600W uses the new popular “sunlight” spectrum that includes warm white, blue, red and IR light. Tons of good reviews from growers back up this budget LED grow light by MARS HYDRO.

True Power Draw~100 watts
LED Type225pcs LEDs Epistar SMD Chips
PAR Test (PPFD)591 µmol/m²/s at 18 inches
Light Coverage1x TS 600W per 4 ft² (0.4 m²)

Roleadro 1000W Galaxyhydro LED Grow Light

Roleadro LED Grow Light, Galaxyhydro-Series 1000W Good-Affordable

Overview: Priced right under $100 at the time of writing, the Roleadro 1000W Galaxyhydro LED grow light is a very low-price LED grow light which uses Epileds 10 watt chips. Full spectrum including infrared and ultraviolet. The Roleadro 1000W Galaxyhydro LED Grow Light shines differently than it’s competitors, producing a higher ratio of red light for increasing yields. High PAR value (453umol at 18 in.) and Lumen output makes this grow light a full spectrum solution from seed to harvest.

True Power Draw132 watts ±5%
LED Type100pcs 10W LEDs
PAR Test (PPFD)950 µmol/m²/s at 12 inches
Light Coverage1x Roleandro 1000W per 9 ft² (0.8 m²) max

BESTVA Reflector Series 600W LED Grow Light

BESTVA Reflector Series Full-Spectrum 600W LED Grow Light

Overview: A unique LED grow light with an affordable selling price, the BESTVA Reflector Series 600W LED Grow Light features the new “Unicorn” radiator design and touts 60 powerful 10W LEDs pulling just around 132W of actual power. 10 watt LED chips are not as common among such cheap indoor grow lights, which makes this BESTVA LED grow light stand out from the competition. Switch on VEG mode for growing and BLOOM mode for flowering and seedlings.

True Power Draw~132 watts
LED Type10W Double-Chip LEDs
PAR Test (PPFD)1359 µmol/m²/s at 18 inches
Light Coverage1x BESTVA Reflector 600W per 4.4 ft² (0.4 m²)

UFO Led Grow Light, Growstar 150W Full Spectrum

UFO Led Grow Light, Growstar 150W Full Spectrum with Cree COB for Cannabis Plants

Overview: UFO LED grow lights were some of the first LED grow lights we saw in the High Times magazines years ago. Back then a small UFO grow light would cost around 400 dollars! Nowadays you can get them much cheaper and this model even comes built with a CREE COB chip set right in the middle for extra juice. The COB provides high PAR value 3000K output combined with LED’s 380-760nm full spectrum light, UV & IR included. A nice cheap LED grow light great for growing in small spaces.

True Power Draw~62 watts
LED Type28pcs 5w Bridgelux/Epileds + 1pcs 10w Cree COB
PAR Test (PPFD)~423 µmol/m²/s at 12 inches
Light Coverage1x Growstar UFO per 5 ft² (0.5 m²)

Best COB LED Grow Lights

Phlizon 2000W CREE COB LED Grow Light

Phlizon 2000W CREE Best COB LED Grow Light for Weed Growing

Overview: COB (Chips-on-Board) LED Grow Lights are made of multiple LED chips put together as one to produce powerful concentrated light. The Phlizon CREE Cob Series 2000W LED Plant Grow Light uses PAR optimized 6000K and 3000K CREE LED chips along with red, blue, IR and UV bulbs to provide a full spectrum, deep penetrating light for plants. You can buy this COB grow light design at multiple size configurations from 1000W up to 3000W.

True Power Draw~400 watts
LED Type2x6000K, 2x3000K COB + mixed LEDs
PAR Test (PPFD)941 µmol/m²/s at 18 inches
Light Coverage1x Phlizon 2000W per 15 ft² (4.6 m²)

COB LED Grow Light, Hipargero 800W

COB LED Grow Light, Hipargero 800W

Overview: Combining the effectiveness of traditional LEDs and COBs together, this affordable COB light is setup with four high power 3000K Epileds COB chips and sixteen 3 watt Osram LEDs. One of the best low-price COB LED grow lights, the Hipargero 800W sells for under 150 dollars and comes standard with daisy chain connections, bloom and veg switches for the best spectrum to match plant growing cycles. Full spectrum from IR to UV. Compared to other COB lights, this one stays exceptionally cool.

True Power Draw~240 watts
LED Type4x3000K COBs + 16pcs 3W Osram LEDs
PAR Test (PPFD)1266 µmol/m²/s at 18 inches
Light Coverage1x Hipargero 800W per 9 ft² (0.8 m²)

VIVOSUN 1200W Cree COB LED Grow Light

VIVOSUN 1200W Cree COB LED Grow Light: Best for Marijuana Cultivation

Overview: The VIVOSUN 1200W Cree COB LED grow light contains 6 high lux Cree COBs (3x 5000K & 3x 3000K) surrounded by 88 3W LEDs ranging from 410 to 730nm to produce a full spectrum mixed light. The fixture is made from aluminum and poly-carbonate materials. Heat is dissipated by a powerful cooling system using 2 large heat sinks and cooling fans. Switchable veg, bloom and full output settings. This hybrid COB LED grow light is sold at a good low price.

True Power Draw~300 watts
LED Type6 CREE COB + 3W LED chips
PAR Test (PPFD)1409 µmol/m²/s at 18 inches
Light Coverage1x VIVOSUN 1200W per 16 ft² (1.5 m²)

CREE CXB3590 COB LED Grow Light, CF Grow 200W

CREE CXB3590 COB LED Grow Light Full-Spectrum Great CF Grow

Overview: This COB LED grow light by CF Grow is built with 2 bright 100W CXB3590 CREE COB arrays that shine a warm white 3500K full spectrum light. The high light intensity of COB LED grow lights help to penetrate through the canopy of bushy herbs while 90-degree glass lenses aid in light distribution. An authentic Meanwell driver regulates the power of the CF Grow CREE CXB3590 COB LED Grow Light.

True Power Draw~200 watts
LED TypeCree CXB3590 COB LED Chips
PAR Test (PPFD)~400 µmol/m²/s 18 inches
Light Coverage1x CF Grow 200W per 7.3 ft² (0.7 m²)

COB LED Grow Light, Niello 600W

COB LED Grow Light, Niello 600W Full-Spectrum Top-25

Overview: The Niello COB D-series 600W has three powerful 200W COB Bridgelux/Epileds LEDs which produce a bright 3000K high PAR full spectrum wavelength, suitable for all stages of plant growth. A lightweight unit, weighing less than 5lbs. Built-in aluminum heat sink and 3 fans for cooling. Priced under $150, this COB LED Grow Light by Niello is just about the best COB LED grow light you can buy for the money.

True Power Draw~210 watts
LED Type3pcs. 200W COB Bridgelux/Epileds LEDs
PAR Test (PPFD)~400 µmol/m²/s at 18 inches
Light Coverage1x Niello 600W COB per 20 ft² (1.9 m²) max
FAQ LED Spectrum Light Wavelength

Full Spectrum & Light Wavelength Explained

light spectrum gif

Absorption of Light

Just like how we can see only a certain range of light spectrum with our eyes, plants use a certain range of light spectrum to grow.

When cannabis grows outdoors, the sun provides the full spectrum of light that the plant needs to grow naturally. Sunlight gets absorbed by the plant’s pigment molecules for photosynthesis (plant growth).

LED grow lights are designed to provide the optimum light wavelengths most beneficial to plant growth. We call this optimal range PAR, short for photosynthetically-active radiation. The PAR spectrum includes the light wavelengths of approximately 400nm to 720nm, illustrated below:

PAR Spectrum Graph: Red and Blue Light Wavelength Plant Absorption

By looking at the PAR spectrum graph we can see that plants use some colors more than others. A plant uses blue light (400nm – 500nm) and red light (620nm – 700nm) wavelengths in the greatest concentrations. This is why we measure the performance of LED grow lights in relation to PAR output rather than Lumens.

You can check the PAR output of a grow light using a PAR meter (also called a PPF meter). This handy device measures per second how many photons of light hit the sensor.

  • PPF short for Photosynthetic Photon Flux, is the amount of light photons that make contact with your plants every second. Only light in the ranges of 400nm to 700nm are measured. The unit of measurement is µmol/s.
  • PPFD stands for Photosynthetic Photon Flux Density. PPFD, measured per second and square meter (µmol/(m-2 m-1 simply written as µmol/m²/s) which we call micromoles or “uMoles” as slang. PPFD shows the density of PAR light in a given area, such as the density of PAR light at 12″ away from the LED grow light. We use PPFD to measure the PAR output of LED grow lights.

Testing the PAR output of a LED grow light may give you an idea of how far away to hang your lights from the plant canopy for optimum growth.

  • 600-1000 µmol/m²/s: High strength light, the best range for developing growth and flowering.
  • 400-600 µmol/m²/s: Medium strength light, for early veg and stretching.
  • 200-400 µmol/m²/s: Low strength light, good for delicate seedlings and clones.

red blue ratio led grow light

Red Light vs. Blue Light

When designing full spectrum LED panels, manufacturers dial in on the color wavelengths that plants absorb the most of, while also providing other colors for a balanced light exposure. Most importantly, red light and blue light.

A balanced full spectrum LED grow light will have not just one red and one blue color frequency, but a whole range of light available to plants. This provides plants will get a similar spectrum of light from that they would expect from the sun.

Red (620nm – 720nm):

Red light in nature helps to promote all-around growth and the flowering process. In nature red light comes out from the sun during late summer and fall, which can explain part of the reason buds form up fat then (the other part is light hours). Red-heavy grow lights do promote heavy budding and flowering, but this doesn’t mean that you should only use red light for your plants.

Balanced with blue light, red light can be used during the whole course of a plant’s life – from seed to harvest. Red color light is needed by plants need to grow healthy. Interestingly enough, plants make the most amount of energy during photosynthesis from red light.

Don’t be fooled by the color you see – even MH (metal halide) grow lights that don’t look very red provide a fair amount of red light to plants. Many LED grow lights also are red-heavy.

Although plants can be grown with pure red light, too much of only red light will not help early vegetative growth. Blue light is also required in good quantity for happy plants!

Blue (400 nm – 500nm):

Blue light is so important that plants literally don’t know where to aim their leaves for light absorption without it.

Plants thrive in their early stages with sufficient levels of blue spectrum light. In the outdoors, blue light is most present during the spring and long-day summer, as plants are in a similar “vegetative” process of growth, naturally.

Without blue light, vegetating plants seem to stay small and stunted – resulting in short stems and a squat stature. Many LED grow light users even add blue light heavy fluorescent lights into the grow room during a plants early stages to get an extra boost of blue light.

If you want tall and leafy plants, crank up the volume of blue light and you’ll get just that. Certain LED grow lights are designed with adjustable blue light and red light dials.

However, you probably just want to run them full blast red and blue for the whole growth cycle, unless you have specific plant size and grow space goals. Too much blue light during flowering will result in stretchier buds, so if you see that be sure to cut some blue and pump up more red light.

UV Ultraviolet LED Bulb

Ultraviolet(UV) Light

Ultraviolet(UV) light under 400nm consist of three main rays:

  • UVA (315–400nm)
  • UVB (280–315nm)
  • UVC (180–280nm)

The newest LED grow lights usually have a few bulbs in the UV range for a few reasons.

In nature, plants are exposed to the sun and are naturally exposed to the ultraviolet radiation that sunlight contains. When humans absorb UV radiation, we produce melanin to defend against the sun’s rays.

Cannabis on the other hand produces trichomes filled with cannabinoids, including the favored Δ 9THC and CBD to protect the plant from UV radiation. In essence, UV can be used to stimulate THC production.

Outdoors, the sunlight at higher elevations gives plants more UV exposure. The growers who live up in the mountains swear their stuff is more potent due to the increased UV exposure, which makes the plant produce more cannabinoids.

We’ve noticed in Hawaii the weed in high-elevations gets super frosty and stony, although it doesn’t yield as much as the low-elevation buds. More anecdotal evidence can be found in this hashish book written in 1965 about the finest quality hash being obtained from plants at high altitudes.

This is why many growers swear that it’s beneficial to use a little UV light – for increasing the plant’s production of THC. You tend see the best LED grow lights have UV bulbs added standard.

However be aware that UV radiation overexposure has been known to degrade different plant processes, including damage to DNA and damage to physiological processes. Too much UV radiation has shown to induce plant mutations. and is harmful to humans.

Outdoor growers don’t need to worry about UV overexposure, the only real danger of UV radiation to plants is from using artificial germicidal lamps to provide short wavelength(UVC) radiation to plants. In other words, you can burn up the plants with too much artificial UV light.

Most of the best LED grow lights on this list feature a small number of LEDs in the UV spectrum, at a safe level for plants and humans.

Infrared (IR) Light Growing Cannabis

Infrared(IR) Light

Infrared (IR) and near infrared light consists of wavelengths over 700nm. Invisible to the human eye, infrared light is felt as heat.

PAR would tell us that deep red (short-wavelength, 680nm), far red(>680nm) infrared would be at large unused by plants for photosynthesis. Only one photoreceptor, phytochrome, is known to respond to far red wavelengths. Phytrochrome helps plants regulate photo-sensitive changes, such as when to start the bloom process.

As we learned from the Emerson Effect, research performed by Robert Emerson showed that plants simultaneously given these wavelengths grew at far higher rate than the sum of the red light and far red light alone.

This gave reason to believe that plants may have two photosystems – one for utilizing short-wavelength light and another for using long-wavelength light.

Infrared LEDs can be found in a lot of the LED grow lights above. The Electric Sky 300 has gained a massive following among cannabis growers for integrating these red “wideband” wavelengths into their lights.

Advantages of LED Grow Lights

There are many benefits to using LED Grow lights in your indoor grow room or even in a protected outdoor environment like a greenhouse.cool-temperature LED grow lights

Simplicity is Cool

LED grow lights run cooler than MH/HPS HID grow lights and the bulbs last much longer.

Compared to a HID indoor grow setup which requires a lot of electricity, cooling and ventilation efforts, LED grow lights can be setup effortlessly in a closet, grow tent or similar space without needing to completely renovate it.

The beauty of LED grow light technology is that they are as easy as plug & play for most situations. The fans and/or built-in heat sink will keep the grow light at a comfortable operating temperature.

This means that you do not need to spend the money or effort into building a super deluxe indoor grow room in order to grow a healthy cannabis crop. Just buy a grow light, crack some seeds and get growing.

save money with cheap LEDs

Low Wattage + High Efficiency

As opposed to HPS and MH lights, LED grow lights run at a much lower wattage while producing more PAR light-per-watt for plants to absorb and grow with.

This high efficiency and low power draw opens up the door for alternative energy sources, such as solar powered grows. For a few hundred bucks you can buy a solar panel, deep cycle marine batteries and an inverter to make your own solar powered indoor grow room. To do it the cheapest way you can just run the light during the nighttime and move plants outside to grow with the sun during the day.

A big step up from fluorescent lights, LED lights have enough penetration to stack even the inside of cannabis plants dense with fat nuggets. Whether they’re in vegetative or flowering cycle, LED lights can do the whole job well done. The “plurple”, pink or white glow emanated from these grow lights is strong and bright enough to give you a dizzy feeling. Remember to wear eye protection when operating LED grow lights.

Why is my 1000W LED grow light only pulling 380W of power?
When a LED grow light is rated at a wattage, such as 400W, 800W, 1000W, etc. that is the max voltage the LEDs can handle. LED grow light manufacturers get the advertised wattage from taking the max voltage each LED can handle, times the number of LEDs in order to give that high number. So a 100 LED grow light labeled 1000 watts, has 100 LEDs that can handle 10 watts but they only supply it with 3 watts so it has some life to it – it really is just a 300 watt light. – Christopher Matthiesen

high-yield cannabis under LED grow lights

High Yields

Modern LED grow lights of today surpass the earlier models of years ago in available spectrum, durability and light strength.

Yields for indoor growers finishing cannabis under full spectrum LED lighting average 1/2 gram per watt among growers in the United States. This is considering the true power draw watt not the rated equivalent advertised.

The ballpark 1/2 gram per watt figure takes into account that your grow room will follow the proper space guidelines of the grow light, and that the plants will be optimized for growth ie. soil, water, nutrients and care.

Of course yields vary from strain to strain. That’s part of what makes growing new strains so fun. Check out these top ranked best sativa and top ranked best indica strains for some good cannabis strains to grow under LEDs.

Best LED Grow Lights on Amazon Shortlist

Grow LightLED TypePAR RatingTrue Wattage
1. Spider Farmer SF-4000 LED Grow LightSAMSUNG LM301B Diodes1320 µmol/m²/s at 18″~456 watts
2. MARS HYDRO TS 3000W LED Grow Light1016pcs LEDs Epistar SMD Chips1095 µmol/m²/s at 18″~450 watts
3. Electric Sky 300 V2 Wideband LED Grow LightGS1 Wideband Spectrum LEDs1036 µmol/m²/s at 18″~300 watts
4. HLG 550 V2 Quantum Board LED Grow LightSamsung LM301B LEDs1400 µmol/m²/s at 18″~480 watts
5. MARS HYDRO SP 250 LED Grow Light684pcs LEDs Epistar SMD Chips925 µmol/m²/s at 18″~230 watts
6. Spider Farmer SF-2000 LED Grow LightSAMSUNG LM301B Diodes1054 µmol/m²/s at 18″~202 watts
7. MARS HYDRO Reflector 960W LED Grow Light192pcs Epistar 5 watt chip LEDs1200 µmol/m²/s at 18″~374/410 watts
8. Advanced Platinum Series P300 LED Grow Light100pcs 3 watt LEDs1050 µmol/m²/s at 18″~80 watts
9. G8LED 240 Watt LED Grow Light8-Band + IR & UV, 3W LEDs890 µmol/m²/s at 12″~140 watts
10. BESTVA 2000W Full Spectrum Dual-Chip LED Grow Light200pcs Dual-Chip 10W Bridgelux/Epileds LEDs1058 µmol/m²/s at 12″~390 watts
11. King Plus 1500W Double-Chips LED Grow Light100pcs 10W Epistar LEDs958 µmol/m²/s at 12″~240 watts
12. HLG 100 Quantum Board LED Grow Light192pcs Samsung LM561C S6 LEDs640 µmol/m²/s at 12″~96 watts
13. VIPARSPECTRA Reflector-Series 600W LED Grow Light120pcs 5W Bridgelux/Epileds LEDs820 µmol/m²/s at 18″~260 watts
14. BESTVA 1000W Full Spectrum Dual-Chip LED Grow Light100pcs Dual-Chip 10W Bridgelux/Epileds LEDs958 µmol/m²/s at 12″~185 watts
15. Yehsence 1500W LED Grow Light150pcs triple chip 15 watt LEDs1317 µmol/m²/s at 12″~265 watts
16. HLG 65 V2 Quantum Board LED Grow Light120pcs Samsung LM301B LEDs480 µmol/m²/s at 12″~65 watts
17. MARS HYDRO TS 600W LED Grow Light225pcs LEDs Epistar SMD Chips591 µmol/m²/s at 18″~100 watts
18. Roleadro 1000W Galaxyhydro LED Grow Light100pcs 10W LEDs950 µmol/m²/s at 12″~132 watts
19. BESTVA Reflector Series 600W LED Grow Light10W double chip LEDs1359 µmol/m²/s at 18″~132 watts
20. UFO Led Grow Light, Growstar 150W Full Spectrum28pcs 5w Bridgelux/Epileds + 1pcs 10w Cree COB~423 µmol/m²/s at 12″~62 watts
21. Phlizon 2000W CREE COB LED Grow Light2x6000K, 2x3000K COB + mixed LEDs941 µmol/m²/s at 18″~400 watts
22. COB LED Grow Light, Hipargero 800W4x3000K COBs + 16pcs 3W Osram LEDs1266 µmol/m²/s at 18″~240 watts
23. VIVOSUN 1200W Cree COB LED Grow Light6 CREE COB + 3W LED chips1409 µmol/m²/s 18″~300 watts
24. CREE CXB3590 COB LED Grow Light, CF Grow 200WCree CXB3590 COB LED Chips~400 µmol/m²/s 18″~200 watts
25. COB LED Grow Light, Niello 600W3pcs 200W COB Bridgelux/Epileds LEDs~400 µmol/m²/s at 18″~210 watts

Disclaimer: Price ranges are subject to change. We do not promote or undertake in illegal activity.

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