You can't do what you enjoy so much when you're terribly uncomfortable. Halogen lights generate heat! The new LED lights are really terrific and the price is horrendous but a lot less than a window a/c unit. My sewing room is on the west side of the house and gets warm at mid day. I do have metal awnings which help a great deal and a ceiling fan (we have central air) for times when the air isn't on. I also have a small 6" personal fan that either clips onto a shelf or sits on a small stand and can be run on low. Whatever works whenever. I would seriously consider getting those halogen bulbs out of there.