Progress Lighting's P817-AT is a low voltage recessed housing that uses one 50W MR-16 incandescent-halogen bulb that operates on a 12V supply. It features an integral electronic transformer, a universal junction box with snap-out sides, a removable housing for field inspection of wiring, and a grounding pigtail ideal for device grounding applications. Progress Lighting has been committed to providing a diverse selection of high-quality lighting fixtures for over 100 years. This P817-AT Lighting Fixture includes integral nailers with integral T-bar mounting clamps for wood joist construction. It has overall dimensions of 9 3/4" x 15 3/4" x 7 1/2" with a 4 1/2" ceiling opening. This Airtight Low Voltage Housing can be adjusted for 1/2" to 2 1/2" thick ceilings. It complies with the Washington State Energy Code (WSEC) requirements, and is listed by the UL-CUL, an independent product safety certification organization which is recognized nationally. This product is manufactured by Progress Lighting, an eminent leader in the lighting industry.