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.
Regardless, letâs take a look at how long the battery pack will last. Each of the 8 batteries generates about 1.5v of current (DC). When combined they have about 2000 mAh (mili-amp hours) of capacity. My 16 feet of LEDs draw about 2000 mAh. This means that the light will be powered for approximately 1 hour.