Globe Electric 40 watt a19 soft white, incandescent medium base light bulb, 4 Pack uses halogen technology to powerfully light large areas. This light bulb can have many applications as it is intended for general household use. Lighting Facts; Brightness: 310 lumens: Estimated yearly energy cost (Based 3hrs/day, 11¢ KwH Cost depends on rates and use): $4.82, Life (Based on 3 hrs/day): 2.7 Years, Light Appearance: 2700 kelvin, Energy Used: 40 watts.