So I did already in fact order the 1200w led light for the 60x60x140 before asking for advise on it, which was stupid of me.
Is it possible to use the light with the door open and fans to decrease hot points?
Sure can, I've been leaving my tent open to help with humidity issues. Shouldn't be an issu. Just make sure you have a few good fans pushing air around also and you'll be ok! Happy growing!