how many watts does christmas lights use

Typically, Christmas lights use anywhere from 0.04 to 0.06 watts per bulb, depending on the size and type of the light. For a typical Christmas tree, which can have anywhere from a few hundred to several thousand lights, the wattage usage can range from about 10 to 100 watts per tree. The amount of power used by Christmas lights varies based on the type of lights, the number of bulbs, the length of time they're in use, and the wattage of the bulbs themselves.