So we now understand that
reputable brand grow lights have good amounts of both read and blue light. It's all in the specifications of the product.
Especially in the early days when the real grow lights were very very expensive, many would use (together) one warm light florescent tube to emit the red spectrum, and one cool white florescent tube to emit the blue light. In fact I still have a four lamp fixture with this set up. However, I think this is less efficient, energy wise, in regard to plant usable light, than using half as many grow lights that emit both blue and red light simultaneously.
I tend to read wiki pages with a skeptical eye, but the wiki color temperature page has a good, easy to read table.
http://en.wikipedia.org/wiki/C...
