I'm not familiar with those bulbs, but from their name, I can only hazard to guess that they are halogen-charged lamps, which have some of the highest operating temperatures out there.
Try getting one of those Compact Fluorescent bulbs that are designed to fit into normal light bulb sockets, and save electricity. Most are very yellow, but there is a new Panasonic bulb that GDominy tried out. Check out his thread...
New, Panasonic EFD Series CF Bulbs - AWESOME