The 2-015 series housing is designed for insulated and airtight ceilings. Performing in accordance with ASTM E283-91, the airtight option also meets the requirements of "having no more than 2.0 CFM air movement from the conditioned space to the ceiling cavity" (Sec. 502.4 of 1991 WSEC—Washington State Electrical Code).PRODUCT FEATURES:- Designed for 50W GU10 halogen 120V lamp- GU10-LED lamp rated for 15W (max.)- 16" hanger bars standard- 20 Ga. cold rolled steel baseplate- 18 Ga. galvanized steel junction box- 5 junction box knock outs- Over lamping protection- Approved for branch circuit wiring