I would buy the energy efficient cool light bulbs for the light right above where you work. Unscrew or loosen the others in the room until you need them. A little portable clip on fan for your sewing table might help too. Make one of the cool neck wrap that has the beads in it. You soak the wrap in water and someone posted the instructions for making them for soldiers in combat. If you can't find it on QB I am sure the instructions and supplies should be on the net.