The low voltage MR-16 Mini-Recessed Lighting Airtight IC Housing for new construction is UL listed for damp locations and near insulation. The airtight technology used in this housing works to prevent air leakage. Its thermal protector safeguards against overheating. Other features include captive nails for fast installation, adjustable bar hangers, snap-on covers on junction box, and we provide integral magnetic transformer offering years of trouble-free operation. It accomodates up to 50w 12v MR-16 lamp.