Is there such thing as too much lighting???

[IronRising]

Hey guys

Got another question for ya. I'm trying to plan out my lighting set up for my 90 gallon reef tank, and my biggest concern is my lighting. LFS always mention minimums (i.e tank size, filters/sump, watts) but is there such a thing as too much. Right now I'm looking at getting a Tek light 48" 8x54 bulb for a total of 432 watts, which gives me 4.8 watts per gallon. I'm pretty sure that's not over doing it but if i decided to add some supplemental lighing for color... what is too much???