The only times I have seen bare bulbs are in big rooms or on a light mover!! Running a fan to exit the heat from the bulbs is also cheaper than running a AC!!! If and when I get new reflectors, I will get them with 8 inch vents and fans!!! My grow is on the second floor and i use 6 inch venting and fans and dont need AC until the temps get above 50 degees outside and i run 4000 watts!! if it were in a basement and I used the 8 inch venting and fans, I would be surprised if I needed AC at all!!!! Oh yeah, as you are setting things up, make blankets for your reflectors with that aluminum rolled insulation stuff!!!!!!! Buy the most expensive aluminum duct tape too, well worth it!!!!! I bet I have waisted $5-10 thousand dollars on trying to do things on the cheap and it just never works!!!!!