Replacement MR11 halogen 5W (watt) 12V (volt) bulb/lamp for studio, trac lighting, pond, water garden, garden flood lighting, fiber optics. Without cover glass, 30 degree wide angle flood bulb (FL or FL-30), bi-pin base types: GU4, GZ4. Measures 1-3/8 inches across reflector diameter. Average bulb life 2000 hours. Actual bulb mounted into the MR11 shape dichroic reflector is: 5 watt, 12 volt, JC type, clear quartz glass, tungsten filament, color temperature 2700K. Brand: Hikari High quality certified manufacturer.