The GE 97598 Ecolux Biax T4 CFL operates 13 watts and has a 4 pin, G24q-2 base. The high quality double tube emits beautiful warm white 2700K color temperature. TCLP compliant, this compact fluorescent light bulb will save up to 80 percent in energy cost. Ideal for facilities, retail displays, hospitality, office, restaurant, and warehouse applications.