Even when covered with insulation, standard recessed lighting fixtures still allow significant amounts of conditioned air to escape and unconditioned air to enter between the fixture and the ceiling opening.
Air leakage can be nearly eliminated, preventing
energy loss and moisture condensation by using recessed lighting
fixtures that have no perforations and a foil gasket to seal between
the recessed lighting and the ceiling.
Energy efficiency can be improved by selecting low-wattage bulbs, such as halogen or fluorescent, that last up to four times longer than incandescent bulbs.
-- Tips courtesy of Service Magic
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