whats the highest the temp can get before its harmfull?

Im running at around 90.. is this acceptable?
FOXBIRD Reviewed by FOXBIRD on . Light heat Take for instance a 400w HPS and a 1000w HPS. Is the heat given out buy the 1000w much more than the 400w. Is it more or less the same? I'm guessing its more but is it a shit load more heat to deal with. Rating: 5