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.