I haven't had to airseal any can lights in several years. I have a client who has many can lights throughout his house and wants to have them airsealed and then insulated over. Several years ago I would have just slapped some light covers over them and foamed them in place to airseal. While I'm looking at purchasing light covers such as the Insul-Lite - 10" x 10" x 12" they aren't too far apart in price from the can light LED retrofit units. My thought is it still considered best practice to leave existing can light alone and still airseal with the light cover from the attic side OR is it better these days to install the can light LED retrofit with some weatherstripping on the underside of the can? If the can light isn't IC rated would installing a weatherstripped LED and then insulating over it be a cleaner looking, better end product for the customer? It would seem that this would be a feasible option, especially with a house with a low pitch roof where you are struggling away in a low attic with little room to move around. The new LED would be significantly cooler than an old incandescent or halogen bulb and thus shouldn't have any risk of overheating. Does anybody have any experience airsealing can lights with both of these approaches and also might have blower door numbers and thermal images to back up their experiences? Any and all thoughts and input is appreciated.
Thanks and have a good weekend!