Heating for a cage

So as Spring and soon Summer approaches, my room is naturally going to get warmer, and it is already blazing hot trying to keep the air temperature high enough for Hector. I get affected by heat easily so maintaining it to be in the mid-seventies makes me sweat bullets at night.

I have this cage: http://www.petsmart.com/product/index.j ... Id=2753290

I was wondering how to go about setting up for heat emitters for him that wouldn't be ones that heat up my entire room. I need to know how many of the heat lights, how to control the heat (do I just monitor the little thermometer that is right next to his cage, or do I get a controlling device), ect.

I want to keep the heat in his little area, but cool it down in mine. I don't want to move him to another room, because there isn't one that will contain the heat as well as mine, and because I can't fall asleep until I've heard him out and about eating or playing on his wheel, it's my mother's instincts.

So, please, all ideas and suggestions are welcome.
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