How Plants Grow Using LED Lights
Green plants only absorb light at specific wavelengths. There are two types of main chlorophylls and each one is capable of absorbing light in either the blue or red spectrum. Chlorophyll A best absorbs light at wavelengths of 430nm and 680nm. Chlorophyll B absorbs light at its maximum efficiency at wavelengths 470nm and 630nm. Chlorophyll will absorb light that falls a bit outside of its peak efficiency but as the wavelength distance increases from max efficiency the efficiency of absorption will decrease quickly.
LED grow lights work by only targeting the wavelengths of light that plants are able to absorb most efficiently. This is why most LED manufactures use 440nm, 470nm, 630nm and 660nm LEDs. Since LED grow lights only produce light in the areas where plants are able to absorb them most efficiently they are able to maximize the growth of the plant when compared to a white spectrum of equivalent light. Guru Grow Lights has spent the last two years developing the best combination of LEDs to use in its grow lights.
If you are interested in learning more about how plants grow or how LED grow lights work check out http://www.357magled.com.