"Can lights" are holes in the ceiling. Air leaks between the fixture and the drywall, and through the fixture itself because of the many holes and seams in it. Dr. Energy Saver’s™ TiteShell™ Can Light Covers are installed over your can lights, fitted around wires and fixture struts, and sealed air-tight with expanding foam. TiteShell™ covers are safe from the fire hazards of hot bulbs and fixtures. Once TiteShells™ are installed, TruSoft™ insulation can be blown into the attic against and over them, eliminating costly gaps in insulation and adding R-value. Results are less drafts and more comfortable rooms, and a tighter more energy efficient home.