COB Vs. Quantum Board LED Grow Lights

(Last Updated On: October 11, 2021)

With the emergence of Quantum Board LED grow lights, everyone thought that the days of Chip On Board or COB LED grow lights were over. Afterward, people started to pose a debate of sorts—the debate of COB Vs. Quantum Board LED grow lights. But it’s not that simple a question.

Both types of grow lights are good for plants. However, the main difference lies in their area of coverage and their footprints. While QB LED grow lights spread out over a larger area to cover a relatively larger heat sink, COB LED grow lights have a lighter coverage, with a concentration in the central area.

Both COB and QB grow lights have their own uses, so if you want to make the most of them, it’s better to look at their capabilities and drawbacks.

Comparison Chart

COB Vs. Quantum Board LED Grow Lights

Do you just want to take a quick look over the differences between these two types of LED grow lights or they are running short on time? We’ve made up a table explaining the differences between these two types of LED lights.

However, if you have enough time on your hands, it’s better to take a look at the discussion right after.

ParametersCOB LED LightQuantum Board LED Light
CoverageRelatively lighter coverage with high intensity in the central partSomewhat broader coverage with even spread
PenetrationHas higher penetration, especially in the middle partHas a sufficient while relatively lower penetration ability
Heat ManagementIt needs to be cooled down by fans when clubbedCan passively cool itself, sometimes uses heat sinks to cool down
UsesFor shooting purposes by filmmakers and photographersFor growing indoor plants, veggies, and others

As you can see, while both types of grow light use white lights under the same principle, they have their differences. But is one better than the other? That question needs a bit more knowledge to answer. So, let’s dive in.

What Are COB LED Grow Lights?

What Are COB LED Grow Lights

Before Quantum Board lights, the Chip On Board or COB LED lights took the industry by storm. COB LED grow lights are composed of multiple LED chips that are bonded together with Silicon Carbide.

But what was so special about COB light that surprised the whole industry? The main reason behind the popularity of COB lights was their life span and efficiency. Back then, Quantum Board LED grow lights weren’t still on the market, so COB lights were the most popular grow lights.

Moreover, COB LED lights have other uses besides helping plants grow. Thanks to its uniform brightness, COB lights have also found their place in shooting studios. That’s right! Filmmakers and photographers use COB LED grow lights in their photo sessions.

However, as they’re a huge source of powerful light, you’ll need to cool this grow light down actively. You can either use huge heat sinks or fans to turn the lights down.

Benefits of COB LED Grow Lights

Benefits of COB LED Grow Lights

It’s the plethora of advantages that took the LED light industry by surprise. Here are some of the benefits that caught our eye.

High CRI

COB lights have a high Color Rendering Index (CRI) rating.

If you’re not familiar with the CRI rating, it refers to how the colors look when put under a light source relative to sunlight. A CRI of 100 means that the light would look the same as it would under the sunlight.

Since COB lights have a high CRI rating, they’re perfect for growing plants without harming them.

Long Lifespan

COB lights have a unique design that equips them with advanced heat sink technology. This new and improved technology allows this type of LED light to deliver service of up to forty to fifty thousand hours.

That means that you can use a COB LED for years on end!

Energy Efficiency

Compared to its predecessors, the COB LED light can produce from 8 lumens per watt and even more! That means that one COB LED light can give you brighter light while consuming less energy, making them an efficient component to any lighting system.

Compact Size

The COB lights have a reduced light-emission area. As a result, they have a compact design. This compact size allows you to set a COB light up in different positions without any difficulties.

Drawbacks of COB LED Grow Lights

There’s an adage that there are no unmixed blessings on earth. This saying holds true in the case of a COB LED grow light. Unfortunately, COB lights come with their own set of drawbacks.


While less material goes into the production of COB lights, its manufacturing process is quite pricey. As a result, COB lights can be pretty expensive. But they’re indeed worth the high price.

Dark Spots

As you may know, COB lights come from only one source. So, the further a surface is from the source, the less light it sheds on it. It can lead to a dark spots phenomenon, which refers to some parts of the grow light that will emit little to no light.

Tends to Overheat

COB lights emit very powerful light. So, it builds up quite a bit of heat. If no options of dissipating heat are found, these lights can overheat. You can get rid of this problem by using a huge heat sink or fans to dissipate the heat actively.

What Are Quantum Board LED Grow Lights?

Quantum Board LED Grow Lights

When the Horticulture Lighting Group (HLG) introduced the industry to the Quantum Board light, everyone was amazed. As its name suggests, the quantum board LED light uses a flat board as its surface. On top of the board lies several diodes producing wonders throughout the industry.

Quantum boards led grow lights use the same principle and the same spectrum as COB lights. However, they differ in their scale.

Unlike the COB, which has many tiny diodes packed onto a single chip, the QB light uses another method. The Quantum Board LED grow light has more spread-out LED lights on its surface. So, you can look at it as a large COB growing light.

Unlike Chip On Board LEDs, Quantum Boards have no fatal flaws. That’s right! If you’re trying to avoid the dark spot problem, you can very well lean on QB LED grow lights.

However, QB LEDs are relatively less potent than their COB counterparts. So, try to make sure if the intensity level is sufficient for your plants.

Benefits of Quantum Board LED Grow Lights

Benefits of Quantum Board LED Grow Lights

Let’s see what makes Quantum Board the new sensation of the market. Here are some of the reasons.

Better Spread

As we said earlier, the QB light has several LED lights on its board. So, it can light up a more spread-out area and more evenly at that. It’s one of the main reasons many gardeners lean towards using Quantum Board lights.

Easy Thermal Management

Unlike COB lights, Quantum Boards have a much easier heat management system. There’s no need for any active cooling. You don’t need any fans or anything. You just need to put up a thin aluminum sheet, and voila! You’re done!

Hangs Closer to Canopy

Since they have lower intensity, QB lights can hang closer to the canopy. And thanks to their spread-out light, they can provide more benefits to your plants.

Disadvantages of Quantum Board LED Grow Lights

As we said earlier, QB lights come with their own sets of benefits and drawbacks. Before you make a decision, it’s better to know the flip side of this growing light. So, let’s take a look.

Tough Installation Process

While most gardeners like to use DIY projects, QB lights have a relatively more complex installation process. It can get quite complicated if you’re just starting out your indoor plant project.

Chances of Low Intensity

Unlike their COB counterparts, QB LEDs have a lower intensity. So, make sure to check if the intensity is suitable for your project or not.

Very Expensive

While COB lights are mass-produced, QB lights are not. That’s why QB lights tend to be even more expensive than their COB counterparts. And even if you have the money, sometimes you may not be able to find the correct set of QB lights you’re looking for.

Which One Should You Get?

Both types of grow lights are great for growing cannabis or any other kind of plant. You should make your decision based on what you need. Here are some scenarios you can consider.

When to Get COB LED Grow Lights

Thanks to their excellent penetration and intensity, COB LEDs are a great choice if you’re looking for higher penetration. And as COB lights are flexible, you can also pick out any patterns you want to work with.

When to Get Quantum Board LED Grow Lights

If you’re looking for a more evened out and widely spread light coverage, you can’t go wrong with a Quantum Board LED grow light. They’re also a great addition to your indoor plant project if you have limited vertical space to work with since they can hang closer to the canopy.

Final Words

COB and QB LED grow lights are both revolutionary lighting systems. It’s hard to say which one of them is better. But after going through our discussion of COB Vs. Quantum Board LED grow light, we can all agree that both the systems have their own uses.

It’s up to you to decide which one you want to go for. We hope that our guide can help you through the process. Happy gardening!

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