Voltage 12, Wattage 100, Base G5.3-4.8, Shape MR11, Overall Length (mm) 37, Life Hours 25, Kelvin 3400, Filament C-6, 1000921-JCR/M-0100, Manufacturer: Ushio L.D. Caulk - Prismetics-Lite 644358 - JCR/M12-100W Replacement Light Bulb - Equipment to Lamp - 1000921-JCR/M-0100 - Manufacturer: Ushio