The Sunlite 38 Watt 2D Fluorescent Light Bulb is a 4 Pin lamp with a bulb wattage of 38W and a brightness of 2000 lm or more. It has a warm white color temperature of 2700k and a long bulb life of 10,000-14,999 hours. The model is 827 POLYLUX and it uses Compact Fluorescent Lamp technology.