Satco 13-watt Pin-based Compact Fluorescent Bulb - 13 W - T4 Size - Soft White Light Color - GX23 Base - 12000 Hour - 4400.3 °F ( 2426.8 °C) Color Temperature - 82 CRI - Energy Saver - 1 Each This twin-tube fluorescent bulb features a two-pin base that is ideal for use in exit signs and most desk lamps. Using just 13 watts, this bulb provides 12, 000 hours of soft, white light. Twin-tube bulb is rated at 2, 700 Kelvin and produces 800 initial lumens. TCLP compliant and meets RoSH standards.