Page Content 1. UT Extension serves the citizens of Fayette County with educational programs in the areas of Agriculture, Family and Consumer Sciences, Community Resource Development, and 4-H Youth Development.
A large globe light, like around a vanity mirror, that is rated at 25 watts consumes exactly the same amount of energy as a small refrigerator light bulb also rated at 25 watts..  Size as a power ratingThe wattage rating of a light bulb is directly proportional to energy consumed by that light bulb. A light bulb rated at 60 watts consumes 50% more energy than a 40 watt light bulb.
Increasing the amount of time that a laptop battery holds a charge simply involves reducing the computer's power demands, which can be effectively accomplished in a number of different ways. A few of the easiest ways to increase battery life are to dim the screen when running on battery power and to avoid running multiple programs if not necessary.