Recessed lighting trim turning brown
My sister had 4" recessed lighting installed during her kitchen remodel last year, and all the white trim kits (painted metal cones) had prominent brown "halos" within a couple of months. The lights are on dimmer switches, and she uses halogen lamps rated for the fixtures. The electrician thought the trim kits might be defective, so he replaced all of them, but the new trim has started to turn brown again. Any other ideas on why this is happening - and what can be done to prevent it?