Voltage 24, Wattage 150, Base G6.35, Shape T4, Overall Length (mm) 50, Life Hours 50, Kelvin 3400, 54263 (64640HLX), 150W-24V-G6.35 BASE-50HR, Manufacturer: Osram-Sylvania Efos - 4075 - FCS Replacement Light Bulb - Equipment to Lamp - 54263 (64640HLX) - 150W-24V-G6.35 BASE-50HR - Manufacturer: Osram-Sylvania