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Best LED Grow Lights 2020 | 4x4 Coverage Area



LED grow light technology has been rapidly advancing over the past several years. A LED grow light that is deemed the best today is often outdone by a competitor within the matter of months. With hundreds of grow lights on the market today, it can be challenging to keep up with. I’ve been studying horticulture lighting and growing with LED grow lights for over 5 years now and I’m often asked what are the best LED grow lights on the market today.

In this article, I will reveal my picks for the Best LED Grow Lights in 2020. This list will include LED grow lights that have a flowering coverage area of 4’x4’ and are best for a full-cycle grow (from seedling through flowering). These are complete fixtures only. This list does not include DIY grow lights or lights that require significant assembly. The grow lights are listed in no specific order. For a LED grow light to make this list, I factor in: PAR output, efficiency, spectrum, light spread, diodes, drivers, and warranty. Since prices are always changing, click either the Amazon link or LED Grow Lights Depot link under each light for the most up-to-date price.

Need a better understanding of PAR output, spectrum, efficacy, energy consumption, or light spread? Check out this complete Buyer’s Guide for LED Grow Lights



FGI Uniformity Pro 640 LED Grow Light


Forever Green Indoors has created the Uniformity Pro 640 LED grow light with four things in mind: "healthy, happy, high-yielding, high potency plants." In partnership with one of the largest commercial indoor farms in Washington, this light radically redefines the intensity of commercial LEDs. With a PPF of 1600 µmol/s and a PPFD of 1130 μmol/s/m², the power draw sits at 640 watts. The design includes eight bars (instead of the standard six) to improve canopy penetration and spread. The UP 640 LED grow light is suitable for a 4' by 4' grow in flower or a 5' by 5' grow in veg. The fixture also uses some of the the best diodes in the industry, Samsung LM281B Neutral White Diodes in 4000K CCT, and 48 Osram Oslon Hyper Red Square 660nm diodes. FGI is so confident in this product they guarantee it with a 5 Year Limited Warranty.


Amazon link


LEDs: Samsung LM281B Neutral White Diodes in 4000K CCT, 48 Osram Oslon Hyper Red Square 660nm diodes

PPFD: 1130 μmol/s/m²

PPF: 1600 µmol/s

PAR efficacy: 2.5 µmol/J

Wattage draw: 640w

Coverage area: Vegetative 5’ x 5’, Flowering 4’ x 4’

Light distance: 12" to 36"

Dimensions: 47” x 47” x 4”

Weight: 37 lbs.

Warranty: 5 Year Limited Warranty



Growers Choice ROI-E680 LED Grow Light


TSL Horti Tech and Grower's Choice worked together to create the ROI-E680. With an even spread, this fixture delivers an excellent PPF. The ROI-E680 fixture has a PAR efficacy of 2.6 µmol/J and pulls a 680 watts. As a full spectrum LED grow light with Osram Top Bin Diodes, the ROI-E680 spans 3000-3300K, providing the specific wavelengths necessary to perfect the veg and flower stages of growth. Despite its intensity, it should save the grower up to 40 percent in energy costs. Growers Choice has built this light to last, as it comes with several certifications appropriate for commercial spaces: IP65, ETL, and CE — not to mention an estimated lifespan of 54,000 hours. The ROI-E680 has an onboard dimmable feature and is compatible with most commercial lighting controllers, including their own Growers Choice model. As with all their products, it comes with a 3 Year Limited Warranty.


Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link

Amazon link


LEDs: 3K CMH Full Phase Spectrum, Osram Top Bin Diodes

PPF: 1700 µmol/s

PAR efficacy: 2.6 µmol/J

Wattage draw: 680w

Coverage area: Vegetative 5’ x 5’, Flowering 4’ x 4’

Light distance: 12" to 24"

Dimensions: 42.4” x 42” x 2.4”

Weight: 30 lbs.

Warranty: 3 Year Limited Warranty



Spider Farmer SF-4000 LED Grow Light


For many growers, Spider Farmer is an affordable yet reputable Chinese brand. According to grower-reports, it rivals some American brands in quality, output, and customer service. The Spider Farmer SF-4000 comes with Full Spectrum Samsung LM301H diodes, including coverage for blue, red, and infrared spectrum (3000K, 5000K, 660nm, and IR 760nm). The fixture supports daisy-chaining, which creates a multi-light connection with unified dimming. Drawing an impressively low 450 watts, the Spider Farmer still provides ample coverage for a 6' x 6' vegetative space or a 4' x 4' to 5' x 5' in bloom. According to reports, this should mean 50 percent less energy compared to a conventional HPS system. The unit has a PAR efficacy of 2.7 µmol/J with PPF of 1215 µmol/s. Plus, with high-quality Samsung diodes, combined with a Meanwell driver, this fixture is built to last. It comes with a full warranty (including shipping) immediately after purchase, which ends in a 3-Year Limited Warranty.


Amazon link (Discount code: MRGROWIT5)


LEDs: Full Spectrum Samsung LM301H Diodes

PPF: 1215 µmol/s

PAR efficacy: 2.7 µmol/J

Wattage draw: 450w

Coverage area: Vegetative 6’ x 6’, Flowering 4' x 4' or 5’ x 5’

Light distance: 12" to 24"

Dimensions: 25.5" x 21.1" x 2.3"

Weight: 19.3 lbs.

Warranty: 3 Year Limited Warranty



Gavita Pro 1700e Gen2 LED Grow Light


The Gavita Pro 1700e Gen2 produces a high 1744 µmol/s output, with an impressive 2.6 µmol/J system efficiency. Its intensity is suitable for up to a 6' by 6' vegetative grow, or a slightly smaller 4' by 4' flower. The unit contains an unheard of 3264 Samsung White LEDs and 72 Osram Deep Red LEDs. With this number of diodes, it can replace a 1000 watt HPS. And despite the capacity, it draws a moderate 646 watts and is dimmable to upwards of 50 percent without changing the efficiency. With passive cooling, Gavita Pro estimates a 30 to 40 percent reduction in HVAC costs. Commercial operations will be happy to hear the Gavita Pro 1900e Gen 2 comes with several critical certifications, including ETL listing, IP66 rated housing and cables, plus RJ45 cables. Unlike many other commercial lights, Gavita offers a 5 Year Limited Warranty.


LED Grow Light Depot link


LEDs: Samsung White LEDs and Osram Deep Red LEDs

PPF: 1744 µmol/s

PAR efficacy: 2.6 µmol/J

Wattage draw: 646w

Coverage area: Vegetative 6' x 6', Flowering 4' x 4'

Light distance: 24" to 36"

Dimensions: 44.1” x 43.7” x 2.3”

Weight: 28.4 lbs.

Warranty: 5 Year Limited Warranty




The Green Sunshine Company ES300 V2 LED Grow Light


The Green Sunshine Company offers a 90-day money-back guarantee and a 3-Year Limited on all their grow lights, including the Electric Sky (ES300) V2. Created with Top-Bin Mid Power Wideband Diodes, it relies on Wideband Spectrum technology to create a full spectrum of intense light, which should technically improve on the range of the sun for plant growth. This spectrum is dimmable and suitable for both vegetative and flower stages of growth. It has an impressive PPF of 936 µmol/s/m2 at an 18" hang height, which increases to 1036 µmol/s/m2 at a 21" height. Impressively, it only pulls 300 Watts, and with no moving parts, it operates silently, with passive cooling. Each two-LED bar Electric Sky fixture provides for a 2' x 4′ to a 3' x 6' area, depending on the stage of growth. Two of these fixtures work excellent in a 4' x 4' grow space, hence, it's on this best LED grow lights for a 4' x 4' grow space list. Every purchase comes with automatic enrollment in the Electric Sky Owner's Club, for ongoing user support.


The Green Sunshine Company link (Discount code: MRGROWIT)

Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link

Amazon link


LEDs: Top-Bin Mid Power Wideband Diodes, GS2 Wideband Spectrum technology

PPFD: 936 to 1036 μmol/s/m² (height dependant)

PAR efficacy: 2.32 μmol/J

Wattage draw: 300w

Coverage area: Vegetative 3 x 6’ ; Flowering 2' x 4' or 2.5’ x 5’

Light distance: Vegetative 24" to 48", Flowering 18" to 20"

Dimensions: 36” x 12” x 2.5”

Weight: 22 lbs.

Warranty: 3 Year Limited Warranty




Enlite Ceres 780W LED Grow Light


The Enlite Ceres 780W sacrifices a bit of efficiency for an improved PPF of 1976 μmol/s. Although this LED grow light may need a slightly higher input of 780 watts, it still holds a steady PAR efficacy of 2.6 µmol/J. Like many intense models, it relies on Samsung White LEDs and Osram Deep Red LEDs, both best in their class for commercial LEDs. It has a dimmable, 120-degree beam of light for a significant spread across the canopy. Suitable for working in 5' by 5' or 4' by 4' spaces, Enlite recommends an ideal hang height of between six to twelve inches above the canopy (making this ideal for shorter commercial spaces). Speaking of commercial indoor operations, do you need commercial certifications? The Enlite Ceres 780w has an ETL rating, CE, RoHS, and IP66. Enlite Ceres also supports a 5 Year Limited Warranty.


LED Grow Light Depot link


LEDs: Samsung White LEDs and Osram Deep Red LEDs

PPF: 1976 μmol/s

PAR efficacy: 2.6 µmol/J

Wattage draw: 780w

Coverage area: Vegetative 5' x 5', Flowering 4' x 4'

Light distance: 6" to 12"

Dimensions: 44" x 44" x 2"

Weight: 35.5 lbs.

Warranty: 5 Year Limited Warranty


Horticulture Lighting Group HLG 550 V2 RSpec LED Grow Light


HLG 550 V2 Rspec combines the best components in the industry into one LED grow light. That means Samsung LM301B 3500K white, Osram top-bin 660nm deep red diodes, and QB-288 quantum boards with a Meanwell Driver. The fixture provides notable coverage for both vegetative (6' by 6') and flower (4.5' by 4.5' or 4' by 5'). Although, this fixture does excellent in a 4' by 4' grow space which is why it's on this list. With this combination, the RSpec is ideal for full-cycle plant growth and for flowering. The fixture has an impressive canopy spread and is diffused for proper penetration. Looking to replace a conventional setup? It effectively replaces a 1000 watt HID system, thanks to a PPF of 1293 µmol/s. Despite this intensity, it is passively cooled and will require far less energy expenditure on HVAC. It's dimmable from 40 watts to 550 watts and is suitable for a daisy chain set up. It comes with a standard 3 Year Limited Warranty.


Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link

Amazon link


LEDs: Samsung LM301B 3500K White and Osram Top-Bin 660nm Deep Red Diodes

PPF: 1293 µmol/s

PAR efficacy: 2.65 µmol/J

Wattage draw: 550w

Coverage area: Vegetative 6’ x 6’, Flowering 4' by 4' or 4.5' x 4.5'

Light distance: 24" to 36"

Dimensions: 26" x 20" x 4"

Weight: 18 lbs.

Warranty: 3 Year Limited Warranty



Horticulture Lighting Group HLG 550 V2 Eco LED Grow Light


A step up in efficiency from other similar LED grow lights, and even from the HLG 550 V2 RSpec. This HLG 550 V2 Eco edition only uses 480 watts, but still retains a PPF of 1200 µmol/s. All this combined with a 2.5 µmol/J system efficiency, this HLG 550 V2 Eco version should replace a single-ended 1000W HID, but with remarkable energy savings. It comes with 1152 top bin full spectrum Samsung LM301H diodes, with an ideal spectrum to cover seed to flower. The unit has a dimmable high-efficiency Inventronics (or Mean Well) driver layered on top of the high-end Samsung diodes. Furthermore, with a diffused light feature, this unit delivers optimal canopy penetration (especially considering this system efficiency). The entire unit is passively cooled, with no need for additional fans.


LED Grow Light Depot link

Amazon link


LEDs: Full Spectrum Samsung LM301H diodes

PPF: 1200 µmol/s

PAR efficacy: 2.5 µmol/J

Wattage draw: 480w

Coverage area: Vegetative 6' x 6', Flowering 4' x 5'

Light distance: 22" to 23”

Dimensions: 24” x 20” x 2”

Weight: 17 lbs.

Warranty: 1 Year Limited Warranty



Arden Emerald Hammer EH500 LED Grow Light


An affordable LED grow light for a 4' by 4' grow space, the Arden Emerald Hammer EH500 draws much lower power (500w) compared to others in this category, but still retains a moderate PPF of 1305 μmol/s. On average, at an 18" hanging height, the PPFD is 867 μmol/s/m². The diodes are full-spectrum, and high quality (Samsung LM301H), including 660nm Deep Red to boost flower. Importantly, for added control over the grow, the unit is dimmable to 50 percent. Compared with other units, the Arden Emerald Hammer EH500 is also lighter, weighing only 18 lbs, which may be necessary for smaller grows and certain tents. The fixture comes with special anti-corrosive and anti-microbial coating, useful within a humid grow environment. As such, it only makes sense it has a 3 Year Limited Warranty.


LED Grow Light Depot link

Amazon link


LEDs: Samsung LM301H + 660nm Deep Red

PPFD: 867 μmol/s/m²

PPF: 1305 μmol/s

PAR efficacy: 2.6 µmol/J

Wattage draw: 500w

Coverage area: Vegetative 6' x 6', Flower 4' x 4' or 5' x 5'

Light distance: 18" to 36"

Dimensions: 28" x 26”

Weight: 18 lbs.

Warranty: 3 Year Limited Warranty



Timber Grow Lights Redwood VS LED Grow Light


Timber Grow Lights made a name for themselves as a go-to for COB grow lights. The Redwood VS model contains seven Bridgelux Vero29 Generation COB LEDs, with a selection of white spectrum available, including 3000K, 3500K, or 4000K. Combined with a Meanwell driver, these are some of the highest quality components on the market. This fixture draws 640 watts and puts out, on average, 906 μmol/m²/s. With passive cooling and a PAR efficacy of 2.45 µmol/J, this is ideal for small spaces. It provides unreal canopy penetration in a 4' by 4' space. The units are dimmable, ranging from 10 to 100 percent and come with daisy chain capabilities. All lights are built to order from their manufacturing facility in San Diego, California, and have a 3 Year Limited Warranty. As such, there is sometimes a wait time before shipment.


Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link


LEDs: Vero29 Generation 7 COB LEDs

PPFD: 906 μmol/m²/s

PPF: 1350 μmol/s

PAR efficacy: 2.45 µmol/J

Wattage draw: 640w

Coverage area: 4’ x 4’

Light distance: 18”

Dimensions: 42” x 24” x 4”

Weight: 31 lbs.

Warranty: 3 Year Limited Warranty



ChilLED Growcraft X4 600W (Commercial Grade) LED Grow Light


Looking for an ideal LED grow light for any grow on a smaller budget? The ChilLED Growcraft X4 may be the smallest model in this line, but still powerful in intensity and output. Using 3rd Gen 2020 Samsung diodes and the Growcraft Yield Max Spectrum, this beast puts out 1575 µmol/s and has a PPFD of 880 μmol/s/m². This fixture also reduces your total heat load, drawing only 600w with a remote power driver location. The X4 600w model is dimmable from five to 100 percent range. The ChilLED Growcraft characterizes this LED as its best price model out of the three in this product line for its standard 4' by 4' grow space or a 5' by 5' grow space. The ChilLED Growcraft X4 600W has a rugged, easy-to-install design and spread for excellent light dispersion.


Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link


LEDs: 3rd Gen 2020 Samsung diodes, Growcraft Yield Max Spectrum

PPFD: 880 μmol/s/m²

PPF: 1575 µmol/s

PAR efficacy: 2.66 μmol/J

Wattage draw: 600w

Coverage area: Standard 4’ x 4’, Max 5’ x 5’

Light distance: 12" to 24"

Dimensions: 42.5” x 42.5” x 1.375”

Weight: 29 lbs.

Warranty: 3 Year Limited Warranty



ChilLED Growcraft X5 600W (Commercial Grade) LED Grow Light


Following the four-bar model (X4 600w), comes the ChilLED Growcraft X5 600W upgrade. Even with five bars, this model continues to draw a cool 600 watts of power despite 1613 µmol/s of output, and an excellent average PPFD of 957 μmol/s/m². The fixture relies on 3rd Gen 2020 Samsung LEDs to provide a perfect full-spectrum to cover all indoor growth stages, from veg to bloom. Due to the sheer intensity, the brand recommends starting low on the dimmable settings to allow plants to acclimate to the output. As with all the models in this series, the X5 600W option is a mere 1.375" thick, making it perfect for space-restricted grow operations. ChilLED Growcraft lights all come with a remote MeanWell HLG-600H-48B power driver, to diffuse heat during operation. They also all come with a 3-year limited warranty.


Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link


LEDs: 3rd Gen 2020 Samsung diodes, Growcraft Yield Max Spectrum

PPFD: 957 μmol/s/m²

PPF: 1613 µmol/s

PAR efficacy: 2.76 µmol/J

Wattage draw: 600w

Coverage area: Standard 4’ x 4’, Max 5’ x 5’

Light distance: 12" to 24"

Dimensions: 42.5” x 42.5” x 1.375”

Weight: 29.5 lbs.

Warranty: 3 Year Limited Warranty



ChilLED Growcraft X6 600W (Commercial Grade) LED Grow Light


The largest option in the 600w LED grow light series from ChilLED Growcraft is the X6 option. With six bars, this model has a PAR efficacy of 2.81 µmol/J, and a PPF of 1647 µmol/s. Growcraft considers this model the best performance in the series. The unit covers a standard 4' by 4' grow space to a max of 5' by 5', and is still a remarkable 1.375" thick. It has an incredible PPFD of 964 μmol/s/m² when hung at an 18" canopy height. Even at the maximum recommended height of 24", this light maintains a PPFD 941 μmol/s/m². And yes, it's dimmable from five to 100 percent and even has a remote driver for better heat dispersion, just like all the smaller models. The ChilLED Growcraft X6 600W comes with a 3 year limited warranty.


Happy Hydro link (Discount code: MRGROWIT)

LED Grow Light Depot link


LEDs: 3rd Gen 2020 Samsung diodes, Growcraft Yield Max Spectrum

PPFD: 964 μmol/s/m²

PPF: 1647 µmol/s

PAR efficacy: 2.81 µmol/J

Wattage draw: 600w

Coverage area: Standard 4’ x 4’, Max 5’ x 5’

Light distance: 12" to 24"

Dimensions: 42.5” x 42.5” x 1.375”

Weight: 33.85 lbs.

Warranty: 3 Year Limited Warranty



Which LED grow light do you think is the best on this list? Do you think any other LED grow lights (with a 4’x4’ flowering coverage area) should have made this list? I’d also love to hear from growers using these LED grow lights. What do you like/dislike about these LED grow lights?



NEXT: LED Grow Light Buyers Guide

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