Die-cast aluminum. Turn-to-lock mushroom head. FINISH: Polyester UV powder coated, available in BK-Black BZ-Bronze VG-Verde Green has been discontinued. LENS: Clear, tempered, and heat resistant glass. LAMP TYPE: 12V, T3 halogen, 35W max. See lamp guide for T3 xenon lamps. MOUNTING: Aluminum stem with 1/2" NPT on bottom, including ground spike.