I'm vegging some plants on the windowsill for about 8 hours and the other 8 hours under 3 24w 6700k fluors + 2 24w 2700k bulbs when they're not in the direct sunlight. (Arizona so the sun is intense)
They're growing really well but their main source of light is the sun, the fluors are just to keep them from even thinking about flowering.
Me: "I'm watching you girls @_@ dun think about it." xP