Halco 101160 - 50 Watt Light Bulb - 12 Volt - A19 - Frost - 1,500 Life Hours - 580 Lumens 50 Watts - 12 Volts Bulb Base : E26 (Medium) Bulb Shape : A19 Average Life (Hours) : 1,500 Length (In.) : 4.25 - Diameter (In.) : 2.4