I have right now on my 125 just reg 80 watts of FO
lights. Im now adding an Ice Cap 660 VHO
system with 2 atinics and 2 whites. (all 110's of course). My temp now stays around 80-81 during the day now and this is with a fan in the canopy (clip on) and one in the sump area blowing just around in the base area. I also have a VERY small fan that is blowing into the sump but not worth mentioning really.
My long shot question is how much heat do you think these bulbs will add and how should I combat it? Im also in the process of adding 2 "computer" fans built into the canopy but are not done yet. I really want to get the lights goning first.