Description: This lamp is a 20 watt, 120 volt compact fluorescent made by Philips. It is a triple tube light bulb with a standard screw base measuring 26 millimeters in diameter and an overall length of 5.5 inches. It is rated at 10,000 life hours with a Kelvin temperature of 2700. CF20/3U/27K Compact Fluorescent Light Bulb