First, it is important to know what most LED lights really are. LED lights with a white color temperature are a combination of the primary colors red, green, and blue. In the LED industry, companies use two methods to produce white light. These include mixing light from red, green, and blue LEDs or using a yellow phosphorous coating over a blue LED. The latter is a more efficient and higher quality solution for home lighting and is used by nearly every LED producer. This works because a large amount of yellow light stimulates both the green and red cones in our eyes, tricking us into seeing white. This method is great for lighting but provides too much green and yellow light while not providing any of the critical red light needed for plant growth.
Soltech solved this problem by first focusing on the spectrum required for photosynthesis, then adjusting that spectrum until we got a high-quality white light!