it could get pretty cold down there.

[HPS]

Ron, I am using the 11-plant sys, in my basement. I have no problems during the veg. Stage, but when I plan on going 12-12 for flowering it could get pretty cold down there. My house water pipes never freeze even in the coldest of winter, but it still probably gets down to the 40's. What do I do for heat-small heater? Do I place it inside my grow area? How will low temp. affect my plants? What about the temp. of my reservoir? How do I run my heater along with my lights and not get too much heat? It will be o.k. during the 12 hrs off, but I am worried when the lights will be on.. 6'x 6'x 6' 2-400w MH, 175 hps will be added just before flowering stage. Please help me. - "Cold in them thare basements"