Voltage 12, Wattage 50, Base PG22, Shape T3, Overall Length (mm) 45, Life Hours 50, 50W-12V-PG22 BASE, Mfgr. Osram/Sylvania Alcon - 613422 Microscope - 64609 Replacement Light Bulb - Equipment to Lamp - 50W-12V-PG22 BASE, 50W-12V-PG22 BASE, Osram/Sylvania