Top 7 Best COB LED Grow Lights Review in 2020-You May Consider !

Have you heard of COB lights? These are creating quite a stir within the indoor growing community because they consume much less power while outputting more light. COB stands for “Chip-On-Board,” meaning that several lights are installed within a single chip.

If you’re looking for the best COB LED grow light in 2020, then look no further. These lights have high reviews, great features and are recognized by the community for helping plants of all sizes grow. Best of all, they are affordable and provide all the light your plants would ever need.We also share the detail in formation about Cob led grow lights so read the whole article.


01.CF Grow Brand Waterproof 300W LED Grow Light

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CF Grow makes a variety of grow lights, including chip on board or COB grow lights. COB grow lights cost a little more than conventional LED grow lights, but they have a number of advantages. They are incredibly energy efficient. They only pull 50 watts.

They have far greater life spans than HPS lights or fluorescent lights. They have a much broader CCT Kelvin scale. Then tend to have a color rendering index of 70 to 100. They’ll generate a full spectrum grow light.

In this best cob led grow light review, we have to mention that these lights can withstand very high temperatures. They’ll continue to operate reliably at 120 degrees C. And that’s in addition to them being water proof. These lights are also very quiet to run. They don’t need fans to stay cool. The aluminum case dissipates the heat. Furthermore, the unit has the intelligence to help dissipate the heat so the light won’t overheat and burn out.

These are the best grow lights for operating in hot, humid environments because they won’t overheat or make the space even hotter. A side benefit of these design elements is that it can operate both indoors and outdoors.

They’ll replace your red and blue lights, allowing you to use less energy while still maintaining the right light strength and spectrum.

An occasional problem with these grow lights is quality control at manufacturing. For example, they sometimes lack ground wires. That can cause shorts if it is used in a wet environment. The built in fans don’t always work from the get go. If the fans aren’t working, the lights will die in a matter of months.

Another issue is that if the bulbs burn out, you can’t replace them because the bulbs are wired in. You can either take the light apart so you can attempt to manually solder in a replacement, or you have to replace the entire light array. This array doesn’t come with a glass lens, though the manufacturer offers those separately.


  • Water proof
  •  Heat resistant
  •  Energy efficient
  • Full spectrum grow light
  • Runs both indoors and out


  • Occasional quality control issues


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02.Cree Model CXB3590 COB Grow Light, 200 Watts


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This CXB3590 grow light is equivalent to a 150 to 200 watt LED grow lights. According to the manufacturer, it matches a 400 watt HPS light, though it is more like half that. It is a full spectrum grow light, though it is weaker on ultraviolet light than expected. It puts out less UVA and UVB than some of its competitors, though this doesn’t matter if you’re looking for a red light. You can use this grow light for seedlings, leafy greens or fruiting plants.

This grow light has a number of benefits. It is dimmable, so you can use it as a supplemental light or full grow light. The glass lenses that come with these grow lights allow you to focus the light on plants. Each of the COB grow lights will cover anywhere from 7.5 to 10 square feet depending on its elevation. Realistically, it can serve a two foot by four foot grow area when hanging 18 inches above the plants.

In our best cob led grow light review list, we should break things down into metrics people understand. Consider it perfect for one to three tomato plants unless you’re using it as a supplemental light for house plants or seedlings sitting in the window sill getting sunlight most of the day.

This model can be daisy chained, allowing you to connect multiple lights via cables and minimize the amount of wires you need in your indoor greenhouse. Another point in favor of this model is that it is easier to replace components than the CF Grow model above. The high quality components rarely fail.

This fixture doesn’t use passive cooling. It has to run a fan. The fan pulls so much power that it uses more power than some of the other grow lights on our list. Don’t expect to daisy-chain four together without tripping a circuit breaker. You can connect maybe two or three together and plug the chain into a standard 120 to 240 volt outlet.


  •  Can be daisy chained
  •  Dimmable
  •  Maintainability


  • Not as bright as advertised
  •  Not as energy efficient as rival products


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03.GROESTAR Brand 600 Watt LED Grow Light


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These COB grow lights are equivalent to 600 Watt grow lights.This is a full spectrum glow light. This model is perfect for applications where you need to provide true full spectrum light, because it really has everything. For example, it has infrared lights along with red lights, blue lights and white lights. These range from 380 nanometers to 780 nanometers.

You can support everything from flowering plants to vegetable growth. It will boost fruiting plants, as well. However, it is better at the low end of the spectrum.

One point in favor of this model is that the lights rarely every burn out. They’ll last for years.

These grow lights are incredibly energy efficient. They also have very high par and lumens output. This means that they match the light output of a 600 watt metal hydride or HPS light but only requires 140 watts. These lights can be daisy-chained, too. Thanks to the lower power consumption, you could run several of these grow lights off of a single conventional power outlet.

This grow light has incredible coverage. It covers a roughly five foot by five foot area at an elevation of 12 inches. You can use it to foster growth in large trays of seedlings.

These grow lights have heat sinks and fans to stay cool. They won’t overheat the greenhouse while running. However, it isn’t water-proof. Don’t use this in a location that is very humid or exposed to the elements.

There is a basic control system, an on/off switch. You can’t dim it. Nor can you switch from red spectrum to blue spectrum light based on the needs of the plants.


  • Very energy efficient
  •  Great at the low end of the spectrum
  • Reliable


  •  Shouldn’t get it wet
  •  Not as great for blue spectrum and woody plants as fruits and seedlings
  •  Not dimmable


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04. 100W Canagrow grow light CXB3590 COD for indoor plants


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The chip on board LED emits a full spectrum of white light that has a 3500K color temperature. This type of light is well fitted for flowering that also works wonders for vegging. In short, it can be said that this light is ideal for every growing stage of a plant.

This fixture consumes about 100 watts of power and it turns that input into an impressive output. It has an effective coverage of 2×2 feet. The intense light emitting from a smaller area penetrates deeper. This fixture emits more green light unlike other grow lights.

One of the great features of this grow light is that you will not see many lights. This will allow you to power off when you will not need full output and thus it will save your electricity. The coverage for flowering is 3×3 feet. The light is much uniform over the coverage area.

The Canagrow 100W grow light uses high-quality components that give you one of the most reliable products that will deliver optimum performance.You can use this led grow light for commercial purposes.


  • Saves around 50% of electricity over HID lights
  • Value for money Good spectrum for plants 3X3 foot for an even distribution of light
  • Best LED chip in the market
  • Dimmer will allow you to dial back the power 2-year warranty
  • Money return guarantee 50,000 hours of life


  • The spectrum coverage could be better


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05. Grow light COB LED 600W by Niello for indoor plantation


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The Niello COB LED 600 watt grow light is the newest light in the D-series that is made to give a full spectrum coverage with a wavelength of 380nm to 780nm to your plants. The light emitted from this lamp is very efficient that can work on all the different stages of a growing plant.

This light is equipped with higher PAR value which his more than an average LED light used for growing indoor plants. This lamp is beautifully designed with a unique and patented cup that is reflective in nature. The lenses are designed in such a way to gather more light and deliver to the canopy of plants in the growing area.

The product ensures to use 98 percent of light effectively. The product comes with 3 high-speed fans along with aluminum heat sinks to get rid of excess heat from the LEDs.


  • Reflective cup for high PAR value and Lux Full-spectrum for all growing stages
  • Chip life gets improved by the glass lens3 high-speed fans for cooling the device
  • Energy-efficient that uses 210W to generate 600 lumens In-built aluminum heat sink for added support to the fan for cooling
  • 2-year warranty Money-back guarantee within 60 days
  • The life expectancy of 50,000 hours


  • Extremely bright, can damage your eyes
  • The fixture is not waterproof


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06. Roleadro COB 400W Full Spectrum LED Grow Light, Daisy Chain Function


Coming with two COB lights, this is great for small indoor gardens or a few plants. Not only is it easy to fit in any area, but it comes with daisy chain functionality. This allows you to infinitely chain COB LED lights together as your growing area increases.

Using full spectrum technology, this will feed your plants every type of light they need to grow properly. It also outputs 400W, which should be more than enough for small indoor growing. As this produces a lot of heat, there are heat sink fans in the back to ensure light never overheats.

What makes this one of the best COB LED grow lights 2019 is that is covers areas so well and that it’s simple to install.


  • Incredibly easy to install and daisy chain infinite units.
  • Provides a full spectrum of color to ensure your plants grow properly.
  • Uses on/off switches on each unit so that you can properly light your area.


  • The two COB lights don’t cover as big an area as the X5.


This light is currently unavailable but you can buy another good cob grow light by clicking the below button-


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07.Meizhi COB grow light 600W

The Meizhi grow light gives a great light output and your plants will get sufficient light. This light has a good lumen output as well, although that doesn’t make any difference in the growth of the plants.

Lumen output is particularly useless if the light has blue and red rays with little green and yellow rays. Hence the lumen output if this light is not at all impressive. On the other hand, the spectrum of this light is better than most lights in its class.

The spectrum consists of mostly red diodes and the ratio over blue diodes is good but there are no white diodes. These lights have yellow and green diodes but in small amounts. Meizhi COB lights have a dual switch used for blooming and seeding.

This will save your money when seeding because you can turn off the bloom lights. Meizhi lights have 120-degree lenses that focus the light on the plant in a downward direction. The Meizhi COB 600 gives a deeper penetration giving a 3 / 3 coverage area.

A great feature that only the best brands adopt is the ability to chain a few other lights together and power them from one outlet.


  • Nice coverage Full-spectrum
  • The cooling system is great
  • Energy efficient Value for money The life expectancy of about 100,000 hours
  • 3 years warranty Money-back guarantee within 30 days


  • Not waterproof

This light is currently unavailable but you can buy another good cob grow light by clicking the below button-


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So now that you have got an idea about the best COB LED grow light you can start your own indoor garden with grow lights that perfectly suits your circumstance


COB LED Grow Light FAQs


01. What is COB in LED lighting?

What is COB in reference to LED lighting? COB stands for chip on board. Chip on board lights are a rather new innovation in LED lights. Multiple LED light chips are connected to a single chip that controls all the lights on the board. Traditional LED light diodes are SMD or surface mounted devices, individually soldered to the control board.


02. Why are COB LEDs better?

COB LED lights may or may not provide broad spectrum light to plants. That’s more a matter of design and the manufacturer’s specifications. Some manufacturers build all white LED lights while others create broad spectrum grow lights that put out red and blue light. A few mix in UV, infrared, far red and green light emitting diodes in their LED grow lights or their COB LEDs.

Then why are COB LEDs better than traditional LED lights? They are generally more energy efficient than conventional LEDs while generating a significant amount of light (lumens) per watt received. And while COB LEDs have a very different design at the circuit level, they resemble and function like existing LED lights.

They are more likely to resemble traditional incandescent lights, and that is a plus to some users. It then generates a steady, uniform beam of light that can’t have dark spots. On the other hand, if the circuit shorts out, the entire thing burns out. In this regard, it is either working or not like an old fashioned light bulb.

Because COB LEDs use slightly less power than mainstream LED light arrays, you’re more likely to be able to daisy chain these grow lights together. Then you need fewer power cords to run your grow lights, and the wires you do need can be hung from the ceiling. Fewer extension power cords means less power loss for grow lights far from the power outlets.


03. What is the difference between LED and COB LED?

Both the LED light and COB LED rely on light emitting diodes. The difference is that the COB LED light has more than one LED tied to each diode. There is only one light circuit and two contacts, no matter how many LED diodes there are.

This can often improve light quality, since only one circuit controls power. It is either on or off. This spares you from the frustrating problem of individual light diodes burning out in a conventional LED light array and trying to solder and repair each. A COB LED with dozens of chips could act like a single bulb, and you may be able to replace it as if it were a single piece.

Both SMD and COB LED lights are assembled on circuit boards. The COB LED light has fewer connection points to the circuit board. To date, this doesn’t lower the assembly cost of the COB LED lights. Instead, the COB design provides lumen-per-watt ratios. This means they’re more energy efficient, generating more light for less power.

Their greater light density means you need less space to generate as much light. Now you need a smaller light array or less space in general for your grow lights. On the other hand, the COBs can easily be spaced far apart on large fixtures, providing better coverage than a single conventional light fixture. Now you have better light spread and uniform growing conditions for a large number of plants.

COB lights generally can’t change color. However, the grow light can have separate arrays of lights, each row a different color and turned on or off by the controller.

One of the biggest benefits of the design is that the entire array of lights often works as a single grow light bulb. That results in deeper canopy penetration of the light. The uniform light output can make it easier to monitor the plants, since you don’t have pink, purple or dark areas that can hide problems like fungal growth.

The COB LED lights will generate heat like any other electrical circuit. This may be a little greater than conventional LED lights, but it is less waste heat generation than incandescent or HPS lights.


04. How does a COB LED work?

A COB LED at its core relies on a circuit board, LED driver to power the circuit board, wires to connect the circuit board to the LED circuits, a heat sink and the LEDs. The LED driver converts the alternating current from the power outlet and turns it into the direct current the LED chips need.

It also gives you the ability to dim the lights, something that other LEDs can do but some traditional grow lights can’t. If the COB LED has several COBs, each driver is connected to the others so that they all work off of the same control board.

A COB holder is optional unless you’re hanging the light. A reflector is useful when you want to maximize light generation, since if intensifies the beam. However, a reflector that isn’t built into a well-designed COB LED light can interfere in heat dissipation.

A concentrating lens will maximize the light that the plants receive, while other lenses can be used to diffuse the light and spread it over a larger area. That may let you hang the COB LED light at a convenient height without sacrificing light levels received by the plants.


05. Diy Cob Led Grow Light

Is it possible to have a DIY COB LED grow light? Yes, if you can assemble the necessary components. However, this is generally unnecessary, since These lights are coming down in price. You’d often pay just as much for the components you assemble yourself as the whole COB LED light for sale. It is a mistake not to use high quality components, since this impacts the performance of the light. In summary, buy a cob led grow light instead of trying to build one yourself.

It is more effective to learn about DIY COB LED grow light repairs, since when a single diode or circuit fails, it can kill the entire light array. In an SMD LED, one diode burning out doesn’t affect the light output or grow light performance much. And overheating of  this light will affect the performance of the entire light fixture.

06. COB LEDS vs. HPS

HPS or High Pressure Sodium vapor lights are one of the standards for high yield indoor growing operations. They rival natural sunlight in output. The downside of HPS lights is that they are power hungry. This is a point in a favor of LED lights if they’re as bright as HPS lights. Good LED grow lights have similar intensity to HPS lights.

LED lights are better when you have heat-sensitive plants, since the LEDs don’t generate as much heat per lumen, and that’s only partially due to the fact they don’t run as much power through their circuits. For example, your LED lights won’t burn the plants if they almost come into physical contact with them. Note that this doesn’t mean they lights can’t effectively sunburn the plants.

You also have more flexibility in where you place the lights, since it won’t damage the stems or leafy canopy if set right next to the plant’s base. On the other hand, HPS lights may be better in indoor but minimally heated grow rooms, since it generates heat and light.

This does mean you need to be careful with ventilation so that there aren’t hot and cold spots in the grow room. The average HPS light lasts 10,000 hours. LED lights can in theory last 100,000 hours or ten times as long.


07. COB LEDS vs. CFL

LED lights turn on instantly when you turn them on. That gives you better overall light quality. LED lights don’t contain mercury, making them a more eco-friendly choice. LED lights use less power than CFL lights. CFL bulbs could last up to 10,000 hours, but LEDs routinely last 50,000 hours. This is as true for a cob led grow light as an SMD grow light.

Another benefit of LED lights is that they come in many more colors than CFL bulbs. That’s one reason why they became so popular as grow lights; they could provide just red and blue light optimized for plant growth. And you could get a mix of red and blue LEDs in one grow light, minimizing the number of lights that needed to be installed and maintained in a grow space. That explains the pink or purple light you see in many indoor greenhouse.

Another point in favor of LEDs is their ability to be tightly controlled. You can use them in conjunction with dimmers as well as timers.


08. COB LEDS vs. CMH

CMH lights are ceramic discharge metal halide lamps. They are often called ceramic metal halide lights, and they are a type of high intensity discharge or HID lamps. These lights are more efficient than traditional quartz metal halide lamps.

CMH lights have a high quality light spectrum for plants. They have a very high CRI, meaning they mimic natural sunlight. For example, they put out some infrared and ultraviolet light in addition to the visible spectrum of light. That creates an environment where it is hard for mold and mildew to grow.

You’re also better able to see the plants without light adjusting glasses. The light spectrum also penetrates deeper into the canopy, making them a better choice for poinsettias and other dense plants.

LED lights are better for creating targeted light. For example, LED lights are far better when you want lots of red light to help lettuce grow as fast as possible or delay the blooming of a plant until just the right time. Or you can use LED lights to target problem areas on the plant without burning them.