Jez, didn't know they are so many experts here!:mrgreen:

Actually, you need both red and blue spectrum for plant growth. One promotes stem growth, the other foliage. So, for a higher yeild, errr ....... I'm incriminating myself here... I should stop.

Though one time I did ask someone if they were an aquarist because I saw the blue light at night, and he told me that his roommate was actually growing plants in the living room with his old MH fixture he used to use over a tank. I had a pretty good laugh.

Only way to make sure your "food plant" is truly organic, is when you actually grow your own!!!!