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I was wondering if you can have to much light? I have 2 55w(250) plus 6 42w(150) CFLs for 2 plants, 1 55w and 3 42w per plant in a 3' wide x 20" deep space. would i get a better yield if i just had one plant under that many lights or would that be to much for just one?
To my knowledge there cant be too much light but those lights can generate too much HEAT for the plants. If the temp remains reasonable then I dont see why it'd be a problem.
I have a great deal of indoor lighting. You will not usually get too much lighting. The main things to watch for are leaf burning at the tops near the lights. If the leaves are being burnt (brown) or bleeched (white), then they have too much light. Do not confuse lighter green foilage that is new at a top as bleeched. A bleeched top will become white. Light green is normal on younger leaves.
The previous comment about heating is also apt. In the same spirit, you may need to water more often as heat increases.
Your safe, CFL's dont have intense enough light to bleach plants. With HPS or MH you can run into bleaching problems when your really throwing the light at them (600 or 1000 watt).
if you look at the picture i attached notice the yellowing of the fan leaves. I had a hotspot in the center of my garden and the intense light would turn ANYTHING yellow that was under it. Temps were in mid 70's, the light is just too intense.