a 1000 watt hps will heat up any room in any house...
but you will turn the light off now and again..
this is where the problem may occur

if the temp between light on and light off drops more than 20 degrees.. you will most certainly get condensation..
and mold..


but what I would recommmend is that you post this 6-10 more times in 4-5 different forums before you make any decissions

LOL
ilove you