GE, F18DBX/835/ECO4P, 18W, Plug In 4 Pin Double Biax Replacement Compact Fluorescent Bulb, G24Q-2 Base, Nominal Length = 5.8", 12,000 Hour, 1,200 Lumens, 3500 Kelvin Color Temperature, CRI=82, Minimum Start Temperature = 32 Degrees Fahrenheit, TCLP Compliant, Energy Star Rated, Boxed.