Get the specs on that bulb. The spectral coverage of a "white" LED is based on a mix of red, green and blue LEDs to get a mixture perceived by the human eye as "white" (or any color, based on the balance - this is the principle of how your computer screen works). Plants only absorb the red and blue parts of the spectrum, so the most efficient lights for plants actually look purplish to the eye. That said, white LEDs come at much cheaper price points and are quite bright; I prefer "warmer" blends that have more red in their output for both my eyes and my plants.
|