Long bulb life of appr. 6,000 hrs. * Dimensions: L: 10.5"; W (Diameter): 3.9"; Length socket base to top of ballast: 4.5"; W (diameter) of socket: 1". * Daylight color temperature of 5500K * Super bright with 4800 Lumins @ 1m * Standard USA E26 base screw-in sockets