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You are here: Home / Buying Guides / Best COB LED Grow Lights (There Aren’t Many Good Ones)

Best COB LED Grow Lights (There Aren’t Many Good Ones)

Last updated December 16, 2020 By Steven 16 Comments

Best COB LED LightsYou’re probably sick of hearing it, right?

“COB LED grow lights are the future. They’re the best lights on the market.”

Is there any truth to it?

Yes, some.

COB LED chips offer some definite advantages (more on those below), but there are also advantages to traditional LED chips.

That’s why the best COB LED grow light is one that combines COB chips with regular chips.

You’ll see that several of the lights reviewed below do exactly that. They give you the best of both worlds.

You’ll also see that the list is fairly short.

That’s because most of what is being sold on the market simply isn’t very good.

Many of the so-called COB LED grow lights don’t even use actual COB chips!

That’s the reason for this article. I did the research and found the best COB LED grow lights on the market. These are lights that work great and sell for a reasonable price.

In short: they give you the best value for the money.

You may have already taken a peak at the lights and noticed two very conspicuous absences on my list. There is a reason for that.

First let’s take a look at the best COB lights. Then I’ll explain why Optic LED and Amare LED are completely missing from this list. After that, I’ll go over the advantages of chip-on-board LEDs and follow that with brief reviews of all of the recommended lights.

 

COB LED Grow Light Comparison Table

Model Size Wattage Coverage PAR (@24") Rating Price
Phlizon COB 2000
Check Price
Weight:
15.5 lbs.

Dimensions:
12.2" x 3.1" x 20.1"

Actual:
451 watts

HID Equiv.:
800 watts

4' x 4' 1561 umol/m²/s 9.6 / 10 $$$$
Aglex 2000W
Check Price
Weight:
12.8 lbs.

Dimensions:
16.5" x 16.5" x 2.2"

Actual:
408 watts

HID Equiv.:
700 watts

4' x 4' 1241 umol/m²/s 9.5 / 10 $$$
Canagrow CREE COB
Check Price
Weight:
22.1 lbs.

Dimensions:
17.7" x 17.7" x 3.9"

Actual:
320 watts

HID Equiv.:
600 watts

3' x 3' 1120 umol/m²/s
(in a 2x2 area)
9.2 / 10 $$$$$
Hipargero 800W
Check Price
Weight:
7.9 lbs.

Dimensions:
11.4" x 9.1" x 2.8"

Actual:
240 watts

HID Equiv.:
400 watts

2' x 2' 721 umol/m²/s 8.4 / 10 $$
Yueme 1500W
Check Price
Weight:
6.9 lbs.

Dimensions:
12" x 8" x 2.2"

Actual:
260 watts

HID Equiv.:
400 watts

2' x 2' not given 8.0 / 10 $

As is always the case with Chinese brands, every spec provided by the manufacturer is grossly exaggerated, especially the wattage.

In the table, I provided the actual wattage and an estimate of the equivalent HID wattage, in lieu of the ludicrous “equivalents” given by the manufacturers.

 

Why No Optic Or Amare Lights?

If you’ve been researching the top COB LED grow light brands on the market, you have no doubt come across two main players: Optic LED and Amare LED. Both of these companies make COB and hybrid COB LED grow light fixtures.

They are generally considered the top of the line brands when it comes to COB LED grow lights.

And while they are good lights, they are not good value.

My top pick, the Phlizon COB Series of grow lights (read more below) are basically exactly the same as the Optic LED grow light fixtures. With one major difference.

Phlizon lights cost half as much as their Optic counterparts.

True, Optic is an American brand. But they are made in China. And they have had serious quality control issues, just like most Chinese brands.

They have upgraded their plant lights and their new Gen4 models have a much lower return rate, so perhaps they have fixed their quality issues.

On top of that, their customer service has also been pretty bad. Not quite as bad as most Chinese companies, but up until recently, Optic was just one guy. He has since hired some customer service help, so perhaps their service will improve, but it is essentially still just a company of one

As for Amare, they are basically the same as Optic (Chinese-made lights rebranded), but more expensive.

In the end, you are generally best off with one of the much cheaper Chinese branded lights I recommend on this page. They have a slightly higher failure rate, and their customer service is worse, but the differences in both are not that big.

The difference in price, on the other hand, is huge. And the best of the cheap COB LED grow lights do a great job growing plants.

 

What Makes COB LEDs Better?

Before we get to the reviews, let’s take a look at why COB LED chips are better. I’ll keep this brief, since you’ve probably already done the research on this, or you would not have found yourself on this page. This article has more info.

The advantages of chip-on-board LEDs are:

  • Compactness: far more LEDs fit into a much smaller space, meaning more output from a smaller area
  • High-Intensity: since more LEDs are packed into a smaller space, the light is more intense, meaning deeper canopy penetration
  • Design simplicity: only use 1 circuit with 2 contacts to energize all the chips on the COB array, reducing the number of components needed
  • Lower failure rate: due to lower heat generation and better heat dissipation and fewer welding points (since each chip is mounted directly on the substrate, instead of soldered in place), quality COBs have a lower failure rate

The primary disadvantage is the fact that COB LEDs are not yet available in every color spectrum. Luckily, they are available in the colors best suited for growing plants (white and pink). The first 4 lights below use warm white and cool white COBs, while the final fixture uses pink ones.

 

Best COB LED Grow Lights: Brief Reviews

These reviews explain why the grow lights got their ratings and will also help you decide which of these fixtures is best for your needs.

 

Phlizon COB Series 2000W LED Plant Light

Phlizon COB SeriesThe Phlizon 2000W COB LED grow light pictured here is one of 3 (at the time of writing) Phlizon lights. They also make a 1000W and a 3000W.

Their wattage figures are way off (read my complete Phlizon review for more on that), but basically, the 1000w fixture is equal to the Optic 2, the 2000w is equal to the Optic 4 and the 3000w is equal to the Optic 6.

And when I say equal, they are virtually identical in terms of specs and performance. The one major difference is price: Phlizon lights cost about half as much as their Optic equivalents.

In short: they are amazing lights. The best on this list. A large reason for that are the high-quality CREE chip-on-boards, which you would not expect on a budget light.

For this brief review, I focused on the 2000w version, since it is closest in specs to the other lights on this list. I gave that light a rating of 9.6 out of 10. All other Phlizon lights have the same rating.

The 2000w Phlizon COB grow light has the highest output of any light on this list, with a PAR reading of over 2000 umol/m²/s dead center at a height of 18 inches. At 24 inches, it gives you 1561 umol/m²/s.

The power usage to achieve that is only 451w. In terms of HID lighting, it is about equivalent to a 800 watts of HID light. It can cover a 4 by 4 foot area during flowering, though I would keep the area closer to 3×3 for maximum intensity. The expected lifespan is 50,000 hours.

The spectrum on this light is great for every stage of growth. It has two warm white and two cool white 50w COBs that combine with a mix of 10w red, blue, white, UV and IR diodes to give you a full spectrum light with two peaks in the red range and one in the blue, plus a large amount of green and yellow light. This is the best spectrum for plants.

This LED grow light does have a switch for veg/bloom and a second switch to turn the COBs on or off, which means you can cut down on power costs when your plants don’t need the full output (during vegging, for example).

When you buy this COB LED grow light, you also get a set of hangers and adjustable rope ratchets, grow light glasses and a thermometer and humidity monitor. You also get a power cord and your light is covered by a 2 year warranty and a 30 day return policy. This is the best COB LED grow light value on the market.

Read my full Phlizon COB Series review.

Pros

  • High quality CREE COB LED grow light diodes: the industry standard
  • Most powerful light on this list (2161 umol/m²/s at 18 inches)
  • Great full spectrum light for plants in all stages of growth
  • 4 by 4 foot coverage is among the largest on this list (though 3×3 gives max intensity)
  • 2 year warranty

Cons

  • More expensive than most other lights on this list
  • Heavier than most other lights on this list
Check Current Price On Amazon

 

Aglex 2000 Watt Full Spectrum COB LED Grow Light

Aglex 2000 Watt Full Spectrum COB PanelLike the Phizon light above, the Aglex Series of lights also combines high-powered COBs with smaller supplemental diodes to provide full-spectrum white light with additional red and blue, plus UV and IR.

It is a great spectrum for plants in any stage of growth and the separate veg and bloom buttons allow you to save some money, by turning some of the diodes off when your plants don’t need full power. The veg switch controls the 4 COBs and the bloom switch controls all of the smaller supplemental diodes.

In terms of light intensity, the Aglex lights deliver as well. It gives you an impressive 1241 umol/m²/s dead center at 24 inches from the canopy and covers a 4 by 4 foot area for flowering (I’d keep it closer to 3 by 3 for best results), while consuming 408w.

That is almost as good as the Phlizon COB LED grow light. Considering the lower price, you are probably wondering why I recommend that light over this one.

I prefer the Phlizon, because they use high quality CREE COBs, as opposed to Bridgelux. Don’t get me wrong: Bridgelux are great, but they are not CREE LEDs, which are the industry standard.

On top of that, Phlizon lights have more power, they come with more extras and Phlizon has a better track record than Aglex. I am just not that familiar with Aglex and was not able to find much info on them.

That makes their lights a bit more of a risk, but if you are looking to spend a little less, they are a great choice. That is why they are rated only slightly behind the Phlizon COB LED grow light, which is probably the best deal on the market today.

The Aglex lights are also a great choice if you want a smaller light. The Phlizon is available with 6 chip on board diodes, with 4 and with 2, whereas the Aglex has versions with 6, 4, 2 and 1 COB.

Every Aglex COB LED grow light is also daisy chainable, so you can connect multiple lights together and run them off a single outlet. They are rated for 50,000 hours of use. Aglex gives you a 3 year warranty on their lights.

Read my full Aglex COB Reflector Series review.

Pros

  • Very powerful with 1241 umol/m²/s at 24 inches
  • Good coverage of 4 x 4 feet
  • Perfect spectrum for all stages of plant growth
  • Daisy chain capability
  • UV and IR diodes
  • 3 year warranty

Cons

  • Aglex is not a well-known brand, which makes it a bit riskier
Check Current Price On Amazon

 

CANAGROW 400 Watt CREE CXB3590 COB LED Grow Light

CANAGROW 400W CREE CXB3590 COB LightRight off the bat: the Canagrow CREE CXB3590 400w COB LED grow light is by far the most expensive option on this list. The same goes for all the other sizes of this light. The high price is what drops them below the previous two lights in my rankings.

But there is a good reason for the price: the quality of the components.

Specifically, it is the top-bin CREE CXB3590 COB LEDs and the Meanwell drivers that drive up the price. Both are the industry standard and far above the Epistar and other chips that the rest of the lights on this list use.

Canagrow also uses the CXB3590 in its 100w light (using a single COB light) and in its 200w light (2 of them). If you go to the Amazon product page, you will also see 2 additional options that are much lower priced. That is because they do not use the CREE COBs and instead use some no-name Korean brand.

You may have also noticed 3 very similar lights to the Canagrow series by a company called CF Grow. Those lights are identical. They are even made in the same factory. They are simply sold by a different seller on Amazon.

I picked the Canagrow lights, because they are usually a bit cheaper, but if you see a sale on the CF Grow  lights making them cheaper, go ahead and buy those.

This review will focus on the 400 watt version, which gives you a PPFD of 1120 umol/m²/s in a 2×2 area (the only value given by the manufacturer) or 48,000 lumen (I’m not sure why they provide the lumens, but they do).

To achieve that intensity, it uses about 320 watts of power. It is roughly equivalent to a 600 watt HID light, although it does not give you as large a coverage area. This light covers about 3 by 3 feet for flowering.

These CREE COBs give you an all-white color spectrum with a color temperature of 3500K. This light includes all wavelengths, from 380 nm to 780 nm. It is a great spectrum for all stages of plant growth, with peaks in the red and blue ranges and lots of yellow and green light as well. Plants love this light spectrum.

That said, I prefer the Phlizon and Aglex COB LED grow light spectrum, because they supplement the 4 COB LEDs with additional red and blue diodes. Those are the colors plants need most, so adding additional light in those colors can really help boost growth and yields. The Canagrow lights also lack UV and IR wavelengths.

All of the Canagrow CXB3590 lights are rated for 50,000 hours of use and they come with a 3 year warranty and a 30 day satisfaction guarantee. If you don’t like them, you can return the lights for a full refund.

If you can afford them, these CREE LEDs are amazing lights. That said, I feel the huge difference in price is not quite justified by the difference in quality of the components. That, and the better color spectrum, is why I prefer the Phlizon and Aglex COB LED grow lights. On the other hand, this light has a dimmer, which none of the others do.

Read my full Canagrow CREE CXB3590 COB grow light review.

Pros

  • Great spectrum for plants (though not quite as good as the Phlizon and Aglex lights)
  • Top of the line CREE COB CXB3590 chips
  • Top of the line Meanwell driver
  • Dimmer so you can reduce power and save on electricity when you don’t need the full intensity
  • 3 year warranty and 30 day money back guarantee

Cons

  • Very expensive compared to other COB LED grow lights on this list
  • No UV and IR
Check Current Price On Amazon

 

Hipargero 800 Watt COB LED Grow Light Fixture

Hipargero 800 Watt COB LEDLike the previous 3 lights, the Hipargero 800 COB LED grow light also features 4 chip-on-board LEDs. The difference is that those LEDs emit far less power than the previous lights.

It also surrounds those Epiled chips with 3 watt Osram supplemental LEDs, but it only uses 16 of them in total. That makes this light far less powerful than the previous 3. Hipargero uses Letron drivers. That is a top Chinese brand, but far from a Meanwell.

This light uses 240 watts of power and gives you a PPFD of 721 umol/m²/s dead center at 24 inches from the canopy, and 1266 umol/m²/s at 18 inches. It covers a 2 by 2 area during bloom and is roughly equivalent to a 400 watt HID light.

The main positives of the Hipargero COB LED grow light are a great spectrum for plants (similar to the Phlizon and Aglex spectra), the ability to daisy chain multiple lights, and a lower price. It is a great light, but there is one big reason why I rated it lower than the previous ones.

This is a fixture with 4 chip-on-board LEDs, but it gives you roughly the same power (and costs about the same) as the Aglex and Phlizon versions with only 2 chip-on-board LEDs. Why would I buy a 4-COB fixture, when a 2-COB fixture gets the same (or better, in the case of Phlizon) results?

That said, if you prefer having more COB LEDs in your fixture, this is a great light and you will be happy with it, as long as you know exactly what to expect from it (i.e. it is only as powerful as other brands’ 2-COB grow light fixtures).

Hipargero gives you a one-year warranty (not good enough anymore, since most Chinese brands now give 2 or 3 years) and a 30 day money-back guarantee. Overall, I would only get this COB LED grow light if the options above are not available. Everything this grow light does for your plants, those lights do better.

Pros

  • Great spectrum for all stages of plant growth
  • Daisy chain capability

Cons

  • Smaller coverage area at 2 x 2 feet
  • Less power than the top COB LED grow lights
  • Warranty is only 1 year
Check Current Price On Amazon

 

Yueme 1500W COB LED Horticultural Light

Yueme 1500W COB LightThe Yueme 1500 horticultural COB LED Grow Light is a bit different than the rest of the lights on this list. It features 5 open COB diodes (i.e. no lenses) and no other diodes apart from those.

The COB chips are made by Epistar and they give off a pinkish light spectrum, instead of the usual white light spectrum.

Their light is full spectrum, but it has peaks on red and blue and is very similar to the spectrum of those lights above that combine COB LEDs with supplementary diodes. It even contains UV and IR wavelengths in its spectrum.

In other words: it is a great spectrum for plants in all stages of growth.

The main issue I have is that the COB LED grow light chips are far less powerful and the lack of any additional diodes means the fixture as a whole is less powerful still. Instead of the advertised 1500 watts, it actually uses about 260 watts and is roughly equivalent to a 400 watt HID light.

Yueme does not provide any light intensity data for their COB LED grow light whatsoever, which is the main reason for the lower rating. Despite the lack of any data from the manufacturer, I can tell you that the intensity is more or less equivalent to the Hipargero COB LED grow light. But this light costs quite a bit less.

So why did I rank it lower?

Mainly because Yueme is an unknown brand, which is always riskier. Moreover, I do not like when brands fail to provide data on their products. That always suggests they may be hiding something, though I suspect in this case it may simply be laziness or a lack of business sense.

If you are on a tight budget and don’t need a light as powerful as the top choices above, it may make sense to take a risk on this COB LED grow light for your indoor plants. It costs very little, so you would not be risking that much. You also get a 2 year warranty, but unfortunately, there is no 30 day return policy.

Pros

  • Great spectrum for indoor plants in all stages of growth
  • Very low price

Cons

  • Less power than the top lights
  • Smaller coverage area than the top lights
  • No return policy
Check Current Price On Amazon

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Comments

  1. Michael Mack says

    June 3, 2019 at 12:07

    I think you need to consider the
    Hortibloom Luma B4 cob grow lights to add to your review.

    They can arrange the lights with 3000k or 4000k

    -They can be 240 or 320 watts draw
    -They can use citizen 1212 or 1218, vero, or cxb 3590
    Cobs depending on your preference.
    -They use meanwell drivers
    -They have a 3-5 year warranty
    -80 cri to 97 cri depending on which chip u use
    -dimmable
    -daisey chainable

    (240 watt 4x citizen 1212 setup cost me 170 usd with free shipping for one fixture)

    Reply
    • Steven says

      June 10, 2019 at 16:11

      Looks interesting, but that’s a company I know nothing about. They don’t even give an address and only list their location as Shenzhen, China, which is a city of over 10 million people. I’m always a bit weary when a company doesn’t list an address on their site, especially when it’s a company that claims to have been in existence since 2005.

      Let us know if you ever need to make a warranty claim on the light. I would love to know how responsive they are when dealing with any issues with their lights.

      Reply
      • Mack says

        July 3, 2019 at 08:19

        Hortibloom is a sub company of geyapex. Geyapex makes commercial led lights for big companies (under that name)
        And use hortibloom for selling their smaller scale grow lights

        Before buying I asked them to array my light bars in a 3k 4k 3k 4k setup which they did.

        Shipping was free

        And they used PayPal.

        Under PayPal buyer and shipper is both protected

        Reply
        • Steven says

          July 6, 2019 at 01:21

          Got it, thanks for the additional info!

          Reply
  2. B Ragsdale says

    July 2, 2019 at 07:39

    Not the first I have seen hawking Chinese products on Amazon mostly junk. Even so always remember your dealing with Amazon’s return policy, Buyer beware still out over 200$ on my last purchase from said Marketplace! So is it really that good !
    My advice buy from a quality manufacturers check return policy and warranty it’s worth a little more for a real warranty no an implied one. Don’t buy Amazon you’ll regret it!

    Reply
    • Mack says

      July 3, 2019 at 08:15

      Philzon has a great response team even when buying off Amazon. You could deal with philizon directly and not Amazon and still get your money back. It’s how good philzon is.

      Philzon.com

      Check em out. And 2-3 year warranty on their lights

      Reply
    • Steven says

      July 6, 2019 at 01:23

      As Mack said, it’s often better to deal with the companies directly, though many of the Chinese brands will be impossible to contact. But with the good ones, even if you buy on Amazon, you can get returns or repairs done much more quickly by contacting the company directly,

      Reply
  3. dave says

    August 31, 2019 at 20:40

    I’m trying to grow plants (trees) in a difficult area.
    On a sloped area. Doesn’t get too much sun. The area is covered over with mature trees.
    Can I add your lights for 6 or 8 hours a day to get some trees growing and established ?
    How close would the lights have to be to starter 1 foot tall plants (trees)?\
    Which light models would I need for a group of trees?
    Thanks

    Reply
    • Steven says

      September 1, 2019 at 00:06

      Sure, the lights would help, obviously. But I have no idea how much light you would need. That depends on far too many factors, like the light requirements of your plants in terms of intensity and spectrum, the amount of natural light, etc. Also, very few of the Chinese lights would work outdoors under natural weather conditions. They are not waterproof and are made specifically for growing plants indoors.

      Reply
      • dave says

        September 1, 2019 at 08:59

        Thanks! I know it’s an odd question.
        The local nurseries have no clue either.
        Thanks,
        Dave

        Reply
    • Michael Mack says

      September 1, 2019 at 09:14

      Using any LED to light trees outdoor is not cost effective or practical.

      If your gonna do anything use a couple open ended 1000 watt HID lights and have the ballasts and the fixtures covered somehow.
      That will be the best bang for your buck.

      They will grow without sun.
      Start them on an indoor outside cycle till they get a couple feet tall. Then put transplant onto your slope. And dont worry about them getting to much shade. Water them enough and they’ll grow eventually.
      I mean are your gonna use artificial lighting for these trees their whole life? If their in shade at seedling their gonna be in shade at maturity. Not sure what.your end game is here is stud

      Maybe put them in 20 gallon pots on the back of the trailer. Grow em in the sunshine for a couple years. then transplant to your shade spot.

      Reply
  4. Redan Boxter says

    September 1, 2019 at 12:17

    Another ad for amazon. Why does one bunch of people who banned me forever because my phone number is different from the one on my bank account. After 6 or 8 years and 50+ purchases.

    Reply
    • Steven says

      September 2, 2019 at 00:46

      What ad? I’m not sure what your issue has to do with my site. It sounds like you need to give Amazon a call and figure out what happened and get it straightened out. Instead of whining about it, fix it.

      Reply
  5. Marco says

    November 15, 2019 at 01:20

    I recommend the spectrolight company from Poland – it works great in large chalets and small ones – the best cannabis lamp

    Reply
  6. Patrick O'Day says

    November 27, 2020 at 18:47

    High Steven. Thanks for translating all this stuff. I have a 10′ long, 5’wide, 7’high space. I am thinking of using 4 Philizon 2000 cob lights, 2 to each 5’x5′ zone. I also have a 500w plasma light, made by Chameleon. I don’t know if that 500w number is accurate. I was thinking of putting that in the middle, or i could trolley it, up and down the center. Your thoughts? Would this be enough light?

    Reply
    • Steven says

      November 28, 2020 at 01:57

      Sounds to me like it will be enough.

      Reply

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