However, plants don't actually need all of this light to grow effectively. White light is just a mixture of all the different colors. The sun, on the otherhand, produces light across the entire visible spectrum (and more).
If you've ever wondered your LEDs shine a bright purple, now you know. When you mix blue and red together what do you get? Purple. Many LED Grow lights have spectrums like this. It shows that the light emitted is concentrated in the 425 - 475 nm range, which corresponds to blue light, and the 600 - 675 nm range which corresponds to red light.
CALIFORNIA LIGHTWORKS 880 FULL
The spectrum of a standard full spectrum LED grow light.
You've probably seen charts like this before when looking at grow lights: Different colors correspond to different wavelengths within this range. When discussing grow lights, we are generally concerned with visible light, which occuplies the 400 nm to 700 nm range. The electromagnetic spectrum refers to all kinds of electromagnetic radiation, this includes visible light, ultraviolet light, x-rays, infrared, and much more! These different groups are defined by their wavelength, which we usually refer to in nanometers (nm).
This is a big topic whenever discussing LED grow lights or grow lights in general, so let's keep it short. What is UVBįirst let's take a step back and talk about the electromagnetic spectrum. Today, let's talk about what UVB is, what it can do for your plants, and how you can get it. As you might expect, the truth is somewere in the middle. Some growers swear that it's the reason they have killer crops, and others say it's completely uncessary for healthy plant growth. You might have hard about the benefits of UVB to your plants, I know I get a lot of questions about it.
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