White light
contains red light, along with blue light and green light. Warm light fluorescents, like the 3400K bulbs, do seem to accelerate the blooming of my indoor zinnias, and they contain somewhat more red light than the cooler white bulbs.
Since plants
don't need green light (that's why they are green -- they reflect the green light rather than use it), some indoor growers use lights that omit green light, and the resulting combination of red and blue light has a hideous purple appearance, in which the green plants appear black. I use white fluorescent lighting, to satisfy both me and my plants.
ZM
