3000K Light vs 3500K

3000K Light vs 3500K: What Should You Pick?

Figuring out which grow light to choose is quite tough. Especially when the light spectrum is evenly matched. I know it’s easy to get confused on such occasions.

But, fear not because I’m here to solve your pain completely.

So, you can’t decide between 3000K light vs 3500K?

Well, for starters, the 3000K one has more warmth than the 3500K. Also, 3000k grow light is better suited for making the flowering process quick. But, the 3500k light is better when it comes to growing veggies for cannabis plants. These differences don’t stop here as there are several others.

I know you may still have some questions on your mind. That’s why I encourage you to explore everything here. 

So, what are you waiting for? Hold on tight because this will be an insightful journey.

A Quick Look At The Lights

Just like choosing between 5-gallon and 7-gallon pots is important, these lights are too! However, similar to those pots, these two lights have some differences. 

That does not mean they don’t have their fair share of similarities as well. 

While the gap is minimal in the light spectrum, features and functions are wide apart. The color temperature varies slightly, giving the 3500k a cooler look. 

On the other hand, 3000k looks a bit warm, like your typical CMH lights. 

As for the other factors, you can check out the comparison table for better understanding-

Points of Comparison3000K Grow Light3500K Grow Light
Color TemperatureWarm Less Warm
EfficiencyEfficient for VegEfficient for budding
Best ForQuicker BudsVeggies
Where to BuyOrder From AmazonOrder From Amazon

As you can see from the table, they may seem similar but they aren’t exactly. These were only just the topics that needed more elaboration. So, don’t you think you are ready to know the details now?

I bet you are! Let’s see what the in-depth comparison reveals.

In-Depth Comparison: 3000K Vs 3500K

Now, we move on to the serious discussion. Here, you’ll find everything you want about these lights and more. 

However, the results and opinions may vary depending on the lights, situations. So, take these discussions or suggestions with a pragmatic mind.

Okay, enough waiting already! Let’s get down to business with the color temperature.

Color Temperature

It’s obvious that the color temperature will show up comparing 3000k vs 3500k grow light. Not only that, the color temperature can actually affect cannabis growth significantly.

Now, coming back to the main discussion, the 3000K temperature is quite warm. At least to our human eye, they seem warm in color. 

Source: LEDMyplace

However, 3500K starts to lose the warmth a bit and looks a little cooler.

Cannabis plants don’t really care much but the little change in temperature. So, the warm or little less warm temperature does not matter too much.

If the comparison was between 3000k light & 4000k, then there would’ve been significant differences. 

However, with these two lights, you will get decent results with both of them.

Winner: 3500k light color is a bit cool and 3000k is a little warm. However, they don’t show any significant differences for plants.

Timing & Location

While the temperature may not have much significance, the distance sure does! During the stages of growing cannabis, you’ll need different types of lights.

You have to keep the lights at least 12” away from the marijuana plants. Or else, the plant is more likely to get bleached. Apart from that, knowing the right time to move the lights is also important.

In the early stages of cannabis growth such as seedlings and vegetative, less intense light is better. Because overheating and intensity can harm the marijuana seedlings. So, 3500k will be better on this occasion. You can increase the distance as the cannabis plants grow.

After the vegetative period, you can be more flexible. A good balance of blues and reds will get you healthy cannabis plants.

Winner: In early stages, 3500K will be slightly better due to cool temperature. However, both are okay to use afterwards.


Well, well, you should definitely keep your eye on this segment. This discussion will surely steer your mind in one direction or the other. Efficiency is just that kind of motivator for any grower out there.

If you don’t want to take any chances with the full cycle, 3000k is better. It offers bigger marijuana buds with a faster growth cycle. So, you will see your cannabis plants growing rapidly without any issues.

Source: Semillas De Marihuana

On the other hand, 3500k offers better efficiency when it comes to veggies. However, in the blooming phase, it takes longer when placed in CMH 3500k grow lights. Only when you are considering wide cannabis leaves, you’re good to go with 3500k.

Otherwise, 3000k is better in the long run. You get a more robust full growth cycle support from these lights.

WInner: For faster growth, 3000K light is better compared to the 3500K one. So, the winner here is 3000K light.

Flowering Ability

Many growers will say flowering is the toughest phase for any plantation. And it’s actually difficult to do it right on the first try. If you don’t choose the right light setup, you will see different cannabis growth altogether.

Even the different curing techniques can get you drastically unalike results.

If you know about water vs air curing, you’re already ahead of your game. However, do you know how these two 3000K & 3500K affect your cannabis flowering growth?

First, let’s talk about the 3000K light spectrum. The flowering ability is better seen in the 3000k light for cannabis. They bloom faster due to an adequate light spectrum. The growth is also decent.

3500k light spectrum provides a late flowering with wide leaves. So, you get larger vegs with 3500k grow lights.

Winner: 3000K lights are more consistent with flowering. 3500k lights are also quite good if you want larger leaves.

Final Verdict

Made up your mind already about which light to choose? If you’re still struggling, don’t be so worried my friend. I’m here to ease your pain for the very last time!

Let’s try to go over all the factors and how they play out. 

First, comes the color temperature. While the color temperature definitely varies, it is not the most significant one. Why? Because the gap in the light spectrum is very minimal.

Usually, the temperature between 3000K & 3500K is almost the same. That’s why it’s better to check out the other factors now. If you want full cannabis growth cycle support, go for 3000k. 

On the other hand, 3500k light for cannabis offers a good balance for veggies. 

Lastly, compact and quick buds come faster with 3000k lights. While 3500k light takes more time to bud and bloom.

So, clear about these two LED grow lights? 

If so, check out these 3000K LED lights if you feel like purchasing one-

If your preferred one is the 3500K one then no worries. We’ve got you covered there too.

I hope you find these suggestions helpful.


Is 3500K Light Good for Flowering?

Many growers tend to go for 3500K for flowering because of the balance it offers. It provides complete growth cycle support from vegetative to blooming phases. Moreover, the necessary blue light is also present which is great for rapid growth. So, 3500k is good for your everyday plant flowering.

Is 3000K Grow Light Good for Growing?

3000K light is very good for growth because of the adequate amount of blue light. The lights have warm tonality with an optimal level of yellow light for growth power. However, the red light is not present in a large number. Still, you can get a good result from these 3000k grow lights.

Which Is Better Between CMH & QB LED?

First of all, CMH and QB have very different purposes for your plant growth. For the perfect compactness of your plants, CMH lights have the upper hand. They give a nice build with their blue light. On the other hand, QB offers that nice spread of light for the fast growth of your plants.


Wasn’t it easy to understand the difference between 3000K light vs 3500K? I hope you can now make a sound decision based on what you’ve just learned.

Don’t hesitate to ask any questions you have on your mind. 

Finally, best of luck growing your cannabis!

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