Tempature

I am running temps in the day around 87f and humidity around 40% night is around 70 with 50% humidity what should my day tems max and what damage can this do? My plants are 3 weeks under 600w m.h about 19 inches from top i was trying to avoid having my mini air conditioner in there i noticed little gold spots on 1 of my plants today would this be do to temps?

one thing high temps can do is reduce your yield, another is attract pest. Day temps should be around 76-78ºF