Cob Led Grow Light

The COB LED phenomena is the subject of this essay. I’ll go through what they are, why they’re a big advancement in indoor grow light technology, and why they’re being rapidly implemented in several indoor …

Growstar 300W UFO Led Grow Light

The COB LED phenomena is the subject of this essay. I’ll go through what they are, why they’re a big advancement in indoor grow light technology, and why they’re being rapidly implemented in several indoor grow rooms around the world. I’ll explain.

In recent years, LEDs have become a viable and economical alternative to HID grow lights, which are large, cumbersome, and hot.

Is the price of COB LEDs worth it?

If you’d want to find out, keep reading!

​What is a COB LED?

An LED packaging technology known as COB (short for Chip-on-Board) refers to a method of putting many LED chips onto one substrate. One ceramic or copper board is wired and packaged with tiny LEDs such that they act as a single light bulb. ​

Lighting panels appear more like a COB LED package is activated than many individual LEDs, as is the case with other LED packages, such as when employing multiple SMD LEDs put near together.


In the images, a single COB LED is seen installed on a passive cooler. The left side of the room is completely dark. LEDs are clearly visible on the right side of the screen, which has been toned down.

Chip-on-Board technology provides for a significantly higher density of LED chips (think a quarter) than surface mount technology (SMD).

The Differences Between COB LEDs And Traditional SMD LEDs

cob led vs smd

SMD (Surface Mounted Device) LEDs are the most prevalent type of best LED grow lights. When it comes to light output, longevity and efficiency, COBs have a few advantages over SMDs, despite the fact that both have a wide light spectrum.

Improved Lumen Density

As a result, COBs have a higher light intensity and more uniformity than SMDs since they can be packed with more LED chips on the same substrate.

More Focused Light

Because more LED chips are packed into a smaller area, the light output is more concentrated. For flowering plants, a reflector can provide a brighter, more intense light source.

Smaller Size

Because COB LEDs occupy less space, a 200 lumen COB LED array can be substantially smaller than a 200 lumen SMD.

Less Heat

COB LEDs produce less heat than standard LEDs because they have fewer components and the thermal sink is positioned near the circuit board. Nevertheless, a significant part of heat distribution is determined by factors like the type of COB substrate used, the design of the heat sink, and the layout of the board circuits. As a result, it’s important to opt for a high-quality COB LED.

However, you should be aware of the drawbacks as well.

COBs Have Less Versatility Than SMD LEDs.

However, despite the fact that you cannot fit as many LED chips on each array, SMDs may accommodate more than one contact. On top of that, each diode on one chip might have its own circuit. There are three colors of diodes available for the SMD chips – blue, red, and green. The light output of each hue can also be changed to create different shades of the same color.

COB LEDs, on the other hand, can only fit two connections and one circuit, despite their many diodes. Because of this, you may notice that COB LEDs create a single color wavelength from time to time, unlike conventional SMD LED lights.

SMDs Generate More Widespread Light Output.

It distributes light more evenly than COBs do. Traditional SMDs, on the other hand, have higher light coverage and penetration for the plant canopy, making it easier to thrive in an open grow environment.

Why Choose COB LED Grow Lights?

Besides cost, COB LED outperforms all other types of grow lights in almost every metric. Let’s get right to the meat of the matter.


Improved Electrical Efficiency

There are a number of ways to estimate the quantity of photosynthetically active light produced per watt of electricity consumed by grow lights. Alternatively, this can be expressed as a kilojoule per watt.

Improved Lifespan

Grow lights that use high-quality LEDs have the longest useable lifespan of any technology now available in the market. Because of their longer lifespan and lower starting cost, quality LED fixtures may be expected to endure for at least 30,000 hours before needing replacement. In other words, it’s a long-term investment.

On the basis of manufacturers’ literature, double-ended HPS lamps can expect a life expectancy of 10,000 hours to 90 percent survival, or 1.65 years when used on an average of 16-hour days or 6,000 hours per year. Traditional mogul-base lamps have industry-reported life expectancies of 10,000 to 17,000.

In the first five years, the cost of a 1000W, double-ended replacement lamp is roughly $140, which works out to an average of $28 each year. There is a slight rise in lamp replacement costs, from $30 to $35 per year when labor is included, but the $600 per year yearly electric cost to operate the fixture dwarfs these costs. Cost of light replacement adds around 5% to the five-year cost of operation.

Individual LEDs, on the other hand, have an expected lifetime of 50,000 hours, or roughly 8.35 years, when utilized an average of 16 hours a day or 6,000 hours a year, when operated at a temperature of 68 degrees Fahrenheit.

​Improved Spectrum​

Typical COB LEDs have a spectrum like this one. However, different companies will have their own unique twists and turns. For the same voltage, any 3500K 90CRI COB should perform very identically to other 3500K 90CRI COBs of the same manufacturer.

There is no other single-point light source that delivers such a broad and focused PAR spectrum, if you’ve studied spectrums before.

​Some 3100k CMH bulbs’ spectrum readings are shown for comparison.



Improved Light Quality

The high Color Rendering Index (often above 80) and wide spectrum of COB LED grow lights are two of the primary reasons for their rapid adoption in many grow rooms.

An object’s appearance is affected by the light source’s color rendering index (CRI), which measures the degree to which minor variations in color hues may be discerned in an object’s appearance. The greater the color rendering index (CRI), the more realistic objects appear.

No matter which COB manufacturer you choose, they all offer at least 70 CRI Broad Spectrum chips and can usually reach 97 CRI, which is a significant improvement over the previous generation of COBs.

A white light with genuine hues is what this signifies. There will be no purple or orange.

Better Light Distribution

Both HIDs and COBs have a single point of light. We, on the other hand, are in a totally different position because COBs are so much easier to position and manipulate.

COB LEDs can be placed more evenly to eliminate hotspots or low-intensity areas in the grow room, rather than employing a single light source.

While one 600W HID fixture would produce a hotspot in the room, we could instead use six COB LED lights that would use less power and provide better coverage than a single 600W HID.

Superior Thermal Performance

​It’s a bit of a challenge, but I’ll get there. The heat output of a 500 watt bulb is exactly that: 500 watts. If it is a HID, a CFL, or an LED, it does not matter. The idea that LEDs are more energy efficient than HIDs is a frequent mistake, and while it is accurate in most cases, it is not the case in this case.

Infrared radiation is the primary culprit. Heat that radiates outward, like the sun on your skin or a coal fire, is far infrared heat. As a matter of fact, it’s the same heat that your body produces. So why are HPS lamps so hot? Because LEDs (unless particularly built to do so) produce very little infrared light, compared to an HPS. ​

COB LEDs Compared to Other Types of Grow Lights

COB LEDs are compared to various types of grow lights in this graphic. To figure out which lights are the best, I gave each one a quality score ranging from 1 to 5, then totaled the scores together. ​

Rating COB LED DE HPS HPS Ceramic MH MH T5 Fluorescent
Price 2 4 3 1 3 5
Power Use 5 4 2 3 2 1
Spectrum 5 3 2 4 3 3
Efficiency 5 4 3 3 2 1
Lifespan 5 3 2 3 2 1
Total 22 18 12 14 12 11

COB LEDs vs. Other LEDs

Recall that COB LEDs are essentially the same technology as regular LEDs, just packaged in a new form factor. As a result, the only thing to compare is the distribution of light.

In terms of light intensity, COB LEDs are among the greatest on the market, but when it comes to light dispersal, they aren’t quite as good as other types of LEDs (meaning all light comes from a single point in space). When utilizing COB LEDs, it’s easy to leave a few “dark” patches if we remember that light diminishes substantially the more away you are from the source. To ensure that the canopy is evenly lit, manufacturers spend a lot of effort designing their lighting and determining the ideal spacing.

SMDs have an advantage over COB LEDs because of their small size, which allows them to be placed close together to form a light panel. One of the challenges here is to make sure that the LEDs are bright enough to justify the higher expense of making such a panel.

Best COB LED Grow Light Reviews

Growstar 300W UFO Led Grow Light

Using a UFO LED Grow Light with a Cree COB, you can grow a wide range of plants without breaking the bank. With a diameter of 10.6 inches and a weight of 4.4 pounds, this light is extremely lightweight and small. They’re fantastic for growing vegetables, but not so great for floral plants. As a result, if you want to maximize the amount of light available to your plants, consider bringing more than one grow light with you.

Despite its low price, the Growstar 300W can cover a 2.5′ by 2.5′ area at a height of 25″ with 108 3 percent wattage. With a 9-color spectrum wavelength that includes IR and UV, they are ideal for growing any type of plant. This product comes with a standard two-year warranty and a 30-day money-back guarantee.

AGLEX 1200W COB LED Grow Light

AGLEX 1200W COB LED Grow Light

The AGLEX COB LED generates an average PAR output of 785 umol/m2s at 24′′ as indicated by the seller, which is plenty for both veg and blooming plants to thrive under. When the light is that bright, it appears to be a good deal. It’s even less expensive than other Chinese makers of grow lights on the market.

However, this device comes with a three-year warranty, which is above average. A 600W-capable version is also available, albeit it is smaller and lighter.

As indicated, these COBs are capable of emitting light across the complete range of wavelengths (380nm-to-788) while producing low heat.

There are some drawbacks, but if you’re searching for an inexpensive COB LED light that will endure for some time and you’re hoping it won’t break down during the middle of the grow, this is an excellent option.

FSGTEK 1500 Watt X5 COB LED Grow Light

FSGTEK 1500 Watt X5 COB LED Grow Light

X5 COB LED Grow Light UV Full Spectrum Plant Light with On/Off 1500 Watt FSGTEK High-precision 90° reflectors and COB Tech are combined to ensure that 98 percent of the light source is applied to your plants, ensuring that you obtain the best possible results from your COB LED Grow Light. ApplicabilityIt is suitable for all stages of plant growth, including house gardens and pot culture, sowing, breeding, a farm and flower exhibitions.

The 1500W COB LED Whole SPECTRUM WITH UV plant light simulates the full spectrum of natural sunlight, including red, blue, white, and UV/IR, to suit the needs of a wide variety of indoor plants during their life cycle.

Two Fans Cooling SystemX5 ENERGY EFFICIENT Compared to standard HPS/MH lights, the COB LED Grow Light consumes just 230-250W. The lamp performs admirably and has an extended lifespan thanks to the addition of two high-speed quiet cooling fans and aluminum heat sinks. In addition, any messages you send will be answered within 24 hours. Scientifically constructed to maintain the correct mix of PAR/Lumen Output and coverage, the COB led grow light is made up of five integrated 300W leds.

This LED grow light has a broad spectrum of wavelengths that are good to plants, including red, blue, white, infrared, and ultraviolet (IR and UV), which is similar to sunlight.

You can make your own COB LED Grow Lights?

do it yourself COB LED Grow Lights

Now, we’ll talk about COB LED grow light approaches and how to cultivate a great cannabis plant. If you want to cultivate a healthy, huge, and attractive cannabis plant, here are a few tips to help you out.

If you’re looking for a lamp, make sure it’s high-quality and meets all of your needs. For the best cannabis plant, you must pay attention to the quality of light you’ll be using. 380-780 nm is the recommended wavelength range for the blue and red lights or lamps that we’ve recommended in this article. For your plant’s well-being, you can use this method.

Correctly positioning the lights is critical for developing healthy and large cannabis plants. It’s best to keep the lamps about 50cm away from the plant, but not too close. There are some lamps that don’t have proper cooling systems, and the heat they produce can harm the plant.

In order to increase the number of cannabis plants, consider purchasing more lighting. Because of this, you can use these lamps to create a sun-like environment in which to care for your plants. When it comes to growing a plant, patience is key. Don’t add extra lamps to one plant because that will accomplish little.


In today’s market, it’s difficult to locate a high-quality LED product that’s also reasonably priced. That’s why I propose the CF Grow COB LEDs if you’re looking for high-quality COB LEDs. The COBS have high-quality CREE LEDs and a MEANWELL driver, and they’re built to last. It’s also packed with special features like controllable light output and complete spectrum wavelengths that other COB lights can’t match. This ensures that your plants will receive the best possible light for a long time.

Budget gardeners don’t have to worry because there are a lot of inexpensive COBs that offer excellent results. The COB LEDs from Roleadro are excellent. They offer a two-year warranty, strong light output, and a lot of positive feedback from people who have purchased them online. These COBs could be a perfect entry point for hydroponic producers of all sizes, from the weekend warrior to the midsize professional.

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