i have a 3x3x6 grow tent with a 400w cool tube the temps inside the tent with the light vented out of the tent it stays at 60, i stopped venting the light out of the tent and it brought the temps up to 70 and the light still stays cool to about 2 inches under the light. is this ok or do i need to vent the light back out of the tent? also i dont have anything planted right now scared the temps wasnt hot enough is it ok to go ahead and start with temps at 70?