T5s and bleaching LPS - anyone noticed this?

[torrid_07]

hey, ive just started getting into corals, i have just purchased a zoo, and a kenyan tree (soft coral). now i have 8. 36w t5s in my 75 gal. is this too much light for my new corals? my lights are sitting about 6" off of the water is that fine or should i be lifting them? i have noticed that the coral almost lies down in the subtrate when the lights go off at night. is this normal? anyways any help with my new corals would be THE WORLD, thanks