Description: ETG GE Modeling Light Bulb: This lamp is a 120 volt, 150 watt halogen light bulb. It is tubular with a glass diameter of .5 inches,a screw base measuring 11 millimeters in diameter and an overall length of 2.8 inches. It has a Kelvin temperature of 2900 and is rated at 2000 life hours. ETG GE Modeling Light Bulb