So many of the pucks' problems are caused by heat. For only 20w, those things get HOT!!! If the cover plate and glass lens come loose and fall on a bread bag,they'll melt right through it. I just hope the bulbs fit. The length and width seem to be ok, but they may be too thick...I might not be able to use the cover lens. These things have been such a pain in the butt. And you gotta use gloves when installing the halogen bulbs.