The L-201A clinic status system is mounted on a double-gang box with one lamp. CORNELL Corridor Light bases feature a translucent, wedge-shaped dome cover, over a single incandescent bulb mounted on a stainless-steel plate. Optional custom screen-printed designations are available on domes. Dome cover color options are White (standard) or Red (Red dome covers NOT UL listed).Technical Information: Power Requirements: 24VDC Operating Environment: 50-120F Indoor Non-condensing Physical Faceplate Dimensions: 4 H x 2 W (1 Gang) Mounting: Single, double, or three Gang back box with 1 minimum depth Wiring: #22 AWG Minimum