BULB GEPRO40WBC/CL 12PK by GE MfrPartNo 24778 General Bulb Shape: 40BC/CL/PRO-12PK-130 Bulb Base Type: Candelabra Screw (E12) Maximum Overall Length: 9.25 in. Color Rendering Index: 82 CRI Average Rated Life: 1500 hr.