85 is perfectly fine... if it starts getting into the 90's + it may start to be a problem... as for the humidity... thats not usually an issue till late growth... due to bud rot.... as for now u want humidity around 50% ... late grow u want it lower... why would u think the heat is too high?.... pick up a thermomiter/hygrometer asap... they are very cheap if your plants are having negative effects its probably not the light... unless its way way to close or way way to hot in there..