COB LED Grow Lights

Reviews of the Best COB LED Grow Lights on the Market

If you have been paying attention to new advancements in grow lighting technology, then chances are you’ve seen references to “COB” grow lights. COB – which stands for “Chip-on-Board” – is a recent development in LED packaging technology where multiple LED chips are mounted directly onto a single substrate to form a singular module. Due to their many advantages over standard lighting options, full spectrum COB LED grow lights are creating a buzz within the hydroponics and cannabis growing communities. Let’s start by looking at some of these advantages, and then review the best COB LED grow lights on the market today.

The Drawback of SMD LED Grow Lights

As advanced as SMD (Surface Mounted Diode) LED technology is compared to older DIP (Dual In-Line Package), the packaging style of SMD still has a few notable flaws. For one, SMD lacks an efficient use of space, which is evident by the visible gaps between each chip. Another drawback of SMD is the less-than-ideal heat dissipating features. Fortunately, the latest LED grow light packaging style of COB LED lighting addresses both of these limitations.

The Advantage of COB LED Grow Lights

So what is exactly is Chip-on-Board technology?  The most notable design advantage of COB packaging is its ability to accommodate nine or more LED diodes on a single chip. LED diodes are bonded directly onto a ceramic, aluminum, or copper substrate to form an array on a single module.  When a COB LED grow light is turned on, these diodes emit a controlled light beam with no visible individual light points. Because these lights can pack more chips into the light-emitting area, COB LED lighting maximizes the lumen output per inch and provides a denser array of light vs. other lighting options.

COB LED technology is actually quite simplistic. To operate, COB relies on just one circuit with two contacts – regardless of the number of diodes (single circuit design). This means that there are fewer components per LED needed to operate properly. The elimination of the standard LED chip structure packaging (and having fewer components) diminishes the heat generation from each LED chip.

In addition, the ceramic/aluminum/copper substrate acts as a heat transfer (when combined with an external heat sink), further improving heat dissipation and increasing its overall efficiency while also lowering its chances of failure. Since each chip is mounted directly onto the substrate (and spot soldering of the individual LED isn’t required), less welding in the manufacture of COB lighting can also translate into lower failure rates.

Disadvantages of COB LED Grow Lights

A major disadvantage in the COB LED packaging is the lack of color-changing features. Additionally, poorly packaged COB lighting can be susceptible to cramming issues, where too many diodes are placed into the same substrate. Overcrowding the substrate could lead to overheating issues and result in a shorter lifespan, emitting fewer lumens, and having a lower overall efficiency. If the light is well-constructed, these issues may be non-existent.

As COB technology advances, we can expect there to be improved functionality to most of the lighting on the market. For now, the COB LED grow lights of today certainly offer a compelling alternative to standard grow light technologies.

Now that you know a little about COB LED lighting, let’s look at some of the best COB LED grow lights on the market.  We will start with a list of the most popular budget-friendly COB LED grow lights currently offered, and follow that with reviews of moderately-priced and advanced (ie, more expensive) COB grow lights.

Inexpensive COB LED Grow Lights

3.5 drop rating

uPONICS Rating

Dimensions: 10.6″ x 2.6″
Weight: 4.4 lbs.
LEDs: 80pcs 3W Bridgelux/Epileds & 1pcs 60W Cree COB
HID Replacement: Replaces a 300W HPS/MH
Avg. Power Draw: 108± 3%W
Core Coverage Area: 2.5′ x 2.5′ at 24″ Height
Max Coverage Area: 3′ x 3′ at 24″ Height
Input Voltage: AC110V
Lifespan: 50000hours
Frequency: 50-60Hz
Package Includes:
1 x 300W UFO LED Grow Light
1 x Hanging Kit
1 x 8′ Power Cord (US 110V grounded, 3 prong)

Growstar 300W Full Spectrum w/ Cree COB

This next generation Growstar UFO LED grow light includes a Cree COB and 9-Bands of full spectrum light – all at an affordable price. With wavelengths of 380-760nm that include UV & IR – plus a quality Cree COB (3000k) –  this light generates high lumen output to ensure good light penetration to hydroponics or soil-based plants. Cannabis, basil, tomatoes, potatoes, pepper, lettuce, etc. will all respond favorably to the illuminating qualities of this grow light. 

The Growstar 300W consumes just 108 watts ±10% while replacing a typical 300W HPS or HID. It’s able to accommodate a 2.5′ X 2..5′ indoor growing area (or grow tent) at 24” height. Max coverage is roughly 3’x3’. The PAR value is about 710umol at a distance of 8″. The Growstar 300W manages heat very well, and the easy on/off switch makes this an intuitive COB grow light for beginner and expert growers alike.

If you are looking for highly automated COB LED grow light with lots of output, then this may not be the one for you. However, considering it costs less than $100, then this is a good choice for value-oriented consumers. The Growstar 300W is a nice introduction into the world of COB LED grow lights and will serve you well with smaller grows.  

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4 drop rating

uPONICS Rating

Dimensions: 5.5 x 9.4 x 14.2
Weight:  6.45 lbs
Lifespan: 50,000hrs
Actual wattage: 200w±5%
Chip size: 45mil
Input voltage: AC85-265v
Working current: 600ma
Working frequency: 50-60Hz
Warranty: 2 years warranty

Roleadro 400W COB LED Grow Light

If you are searching for a great COB light for under $100, look no further than the Roleadro (aka Galaxy Hydro) 400W full spectrum COB LED grow light. This model has received stellar customer reviews and offered at an affordable price.

Roleadro’s chip-on-board technology integrates multiple LED chips into one panel to improve color uniformity and increase brightness and PAR value. As a result of this COB technology, plants are able to increase their yield and overall health. The Roleadro 400W COB light has built-in heat sinks, sunflower radiator system (to keep temps under 118.4 ℉), and UL-approved cooling fans to provide superior heat dissipation.

The Roleandro 400W comes equipped with daisy chain connection capabilities, an easy on/off switch, and an anti-corrosion stainless-steel hanging kit. Roleadro/Galaxy Hydro also offers a generous 2-year warranty. If you are looking for a great little COB light at a super price, consider this one!

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Moderately Priced COB LED Grow Lights

4 drop rating

uPONICS Rating

Dimensions: 12.2″ x 8.26″ x 2.36″
Weight: NW:2.32kg; GW:3.2kg
LEDs: Epistar 
Wavelengths: 410nm, 430~440nm, 450~475nm, 620~630nm, 650~670nm, White, IR(730nm)
Coverage Area: about 3.8 x 4.5 ft
Surface Material: Anti-oxidation aluminum
Lifespan: >50,000hours
Worldwide Voltage: 85v-265v
Working Frequency: 50~60Hz
Modular Power Cord: (US, UK, EU, AU, JP)

King X5 1500W COB LED Grow Light

King X5 not only looks pretty on the outside, but it also performs exceptionally well in any indoor growing environment.  This light features a full spectrum of 410-730nm to ensure your veg and bloom cycles are fully optimized. KingLED’s X5 1500W grow light comes equipped with 5pcs 300W integrated COB LEDs (Epistar) and consumes roughly 265W of power. With an estimated lifespan of 50,000 hours, this light won’t cost you much to operate and will last a long time.

King X5 is designed with two cooling fans and heat sinks to effectively manage any radiant heat issues. Plus, there are no glass components to contend with. Each light comes with a power cord, a hanging hook, a 3-years warranty, and a 30-day return or money back guarantee. 

Sizes Available: 900W, 1200W, 1500W, 1800W

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4.5 drop rating

uPONICS Rating

Dimensions (mm): 450 x 310 x 83 mm
Weight 26.1 lbs.
LEDs: 6X COB Epileds Chips
Theoretical Power: 1800W
Consume Power:310W
Worldwide Voltage: AC85~265V
Working Frequency: 50 ~ 60Hz
Working temperature: -4 – 104 ¡§H
View Angle of reflector: 90 degree patented reflector cup
Casing color: White
Packing volume weight: 7KG
Warranty and lifespan: 2 years warranty and 50,000 hours life span
Recommended lighting time: 14 – 18 hours for vegetative stage; 10 – 12 hours for flowering stage
Recommended height: 0.3 ¨C 1.5 m according to different growing stages
Coverage Area: Lighting Area: 6-10 ft Flowering Stage

Morsen COB 1800W LED Grow Light

The Morsen 1800W COB LED grow light is a super powerful and bright light offered at a great price. It uses 6 integrated Epiled chips to improve efficiency and color uniformity and is designed with unique reflective cups for higher light-gathering effects. The end result is better light absorption for your plants vs the standard grow light options. The Morsen 1800W COB LED grow light replaces a 1800W HPS while consuming a mere 310W of power. This energy efficiency will translate into big cost savings on your electricity bill.

The full spectrum of 380nm-840nm provides all the color plants need at all stage of growth. Morsen’s 1800W features 2-button on/off switch with the flexibility to run at half or full strength. A generous 3 years warranty – plus 30 days satisfaction/return guarantee – is included.

Package included: 
1 LED grow light
1 power cord
1 stainless steel hanging hook

Also available in 600W

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4 drop rating

uPONICS Rating

Dimensions (mm): 540 x 180 x 90 mm
Weight: N.W: 6KG (G.W: 6.5KG)
Actual Power: 185~200W
LEDs: 2pcs x 100W CXB3590
Wavelength: Full Spectrum 380nm~780nm
Light Color: Warm White(3500K)
Input Voltage: 120Vac/240VAC
Frequency: 50Hz/60Hz
Current: 5.2A
Out voltage: 36VDC
Flux Lm: 26000lm
Lifetime: 50000 hrs

CF Grow Cree CXB3590 200W COB LED Grow Light

CF Grow’s Cree CXB3590 is a high quality and powerful COB LED grow light. It features a  full spectrum of 380nm~780nm to support plants during all stages of growth. The 2pcs, 100W COB LED chips produces a warm white color that is powerful, effective, and won’t turn your grow room into a purplish haze.

If you are searching for a suitable replacement for a 400W HPS grow light, CF Grow’s Cree CXB3590 fits the bill.  It has an actual power draw of 185~200W and each LED chip can reach 120W of power. CF Grow uses high-quality parts to complete the CXB3590, including LED driver by MEAN WELL USA, COB holder by IDEAL USA, and connector by Germany’s WAGO. With a lifespan of 50,000 hours, this well-built grow light will enable your plants to thrive for a long time.

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Advanced COB LED Grow Lights

3.5 drop rating

uPONICS Rating

Dimensions: 12.6″ x 12.6″ x 3.3″
Weight: 11 lbs.
Chip quantities: 4pcs 64 x 3w
Chip size: red:blue: 42mil-45mil
Certification: CE, RoHS, FCC (CSA standard COB led grow light can be customized)
View Angle of reflector: 90 degree patent reflector cup
Input voltage: AC85~265V
Current: 600ma
Working frequency: 50 – 60 Hz
Working temperature: -4 – 122 ℉
Lifespan: 50000 hrs
Material: Iron
Warranty: 2 yr
Package included:
1 Galaxyhydro COB led grow light
1 power cord
1 stainless steel hanging kit

Roleadro 800W COB LED Grow Light

Lab tests prove that Roleadro (aka Galaxy Hydro) COB grow lights produce higher PAR and Lux values compared to conventional LED grow lights. Why? For one, Roleadro COB LED lights feature a patented reflector cup design (90 degrees) to provide plants with better light absorption. And with the integrated COB 3w Eplieds chips illuminating the light, plants will receive the best light proportion at every stage of growth – from flowering to fruiting. 

How about heat dissipation? Roleadro has you covered on that, as well. Their patented sunflower radiator provides advanced heat dissipation so that temperatures at the bottom of the chips never reach above 118.4 ℉.  The daisy chain functionality allows you to connect multiple lights side-by-side so that you can optimize your lighting to fit your growing space.

If the 4 COB chip, 800W LED grow light isn’t the power you are looking for, then consider Roleadro’s other offerings, including the 200W (w/ 1 COB chip), 400W (w/ 2 COB chips), and 1200W (6 COB chips). Each light comes with a 2-year warranty, 1 power cord, and a 1 stainless steel hanging kit.

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4 drop rating

uPONICS Rating

Dimensions: 18.8″ x 12.9″ x 3.54″
Weight: 17 lbs.
Chips: 12pcs Integrated 300W Leds 
Actual Power Consumption
:  roughly 545W
Coverage Area
: about 5 x 5 sq ft
Power Factor
: >97% 
: 90000lm 
: >50,000 hrs 
Worldwide Voltage
: 85v-265v
Working Frequency
: 50~60Hz
Working environment
: -20~40 ℃ 45%~95%RH 
: 3 Year

Morsen MAX12 3600W with On/Off Dimmer Switch     

If you are looking for a powerful COB grow lights with superior heat management, then look no further than Morsen’s MAX series.

The Morsen MAX12 has a total of 12pcs integrated 300W COB LED chips to give this super high-intensity light an astounding 3600W.  It consumes just 545W of power while emitting a uniform color of light. The 3600W includes blue, red, UV, and IR with a full spectrum of 380nm to 780nm, perfect for supporting plants through every stage of growth. Plus, the on/off dimmer switch function lets you have more control over your grows.                                                                                                                        
Morsen’s Max12 is designed with powerful cooling fans, built-in heat sinks, and venting in the aluminum side panels. Improper heat dissipation should never become an issue with this light. This superior heat management and its glass-free construction ensure that the MAX12 will have a long lifespan. Each light comes with a hanging hook and power cord, plus a generous 3-year warranty and a 30-day satisfaction/return guarantee.

Sizes Available: 1200W, 1500W, 2700W (dimmable), 3600W (dimmable)

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5 drop rating

uPONICS Rating

Dimensions: 36″ x 3″ x 9″
Weight: 22 lbs.
Max Power: 620 watts
HID equivalent: 1000 watt DE HPS
LEDs: (UV/IR) 6 x 50-watt CREE COB LEDs 96 x 5-watt supplemental Bridgelux/Epistar LEDs Red diodes: Epistar Dual Core Red Diodes Blue and White diodes: Bridgelux Blues Dual Core Whites single core
Optics: Secondary Lens
Spectrum: Full-spectrum + near infrared + Ultra Violet
PAR: 1550 umol/m2/s at center of footprint
Recommended Coverage area: Veg: 5′ x 4′ (Max 6′ x 5′) Flower: 4′ x 4′ (Max 5″ x 4′)
Recommended hanging height: Veg: 24″-36″ Flower: 24″-30″
 Timer: Built in 6 Stage Timer. 10/12/14/16/18/24 Dimmability: Dual Channel
Thermal management: 6 x cooling fans, heat-sinks
Lighting package includes: 120v power cord, hanging hooks, hanging cables & fixture


Optic LED offers some of the highest quality and most powerful COB LED grow lights on the market today. This model – the Optic 6  –  is loaded with the power and functionality to illuminate a 4’ x 4’ coverage area with natural colors. It has a maximum power of 620W HID equivalent, 1000W DE HPS LEDs, with a full spectrum of UV and IR that includes (6) 50W CREE COB LEDs, (96) 5-watt supplemental Bridgelux/Epistar LEDs Red diodes and Epistar Dual Core Red, White, and Blue diodes with Bridgelux Blues Dual Core whites single core. Simply put, this light is stacked with power!

Optic 6 features secondary reflectors to magnify PAR output by 200% as they direct light downward. There is a 6 channel built-in timer and 3 channel dimmers to adjust the 5W diode array and COBS independently.  The 6 cooling fans and heat-sink ensure that this light efficiently manages the heat output. As far as COB lighting goes, Optic LED’s Optic 6 is the real deal. And since there is 5-year (!) warranty with each purchase, then Optic LED guarantees it has your back if something goes wrong.

Other sizes available: Optic 1 (54W), Optic 2 (205W), Optic 3 (162W), Optic 4 (414W), Optic 8+ (500W)

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We hope that our COB LED Grow Light Reviews article helps you choose the best lighting for your indoor growing needs.

Feel free to check out our other hydroponics and aquaponics articles, including our Hydroponics System ReviewsMarijuana Growing Supplies, Best LED Grow Lights, Grow Tent Kits, Grow Lights for Weed, and LED Grow Light Reviews pages.

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