GE, ,F13DBX23/835/ECO, 13W, CFL Plug In 2 Pin Double Biax Compact Fluorescent Replacement Bulb, GX23-2 Base, Nominal Length = 4.7", 10,000 Hours, 810 Lumens, 3500 Kelvin Color Temperature, CRI=82, Minimum Start Temperature = 25°ree. Fahrenheit, TCLP Compliant, Boxed.