Triangle Bulbs T10003-20 (20 pack) - Q10//G4/CL/12V, 10 Watt, T3 JC Type, 12 Volt, Clear, G4 Bi-pin Base, Halogen Light Bulb, 20 Pack (20) x jc type G4 halogen bulb 12V 10W Base: G4 clear bi-pin base (4 millimeters between pins) | dimension: see picture Long life: approx. 2,000 hours bulb life Versatile usage: applicable home, office, restaurants, and stores High brightness & energy efficient light bulb