how many watts do christmas lights use

Christmas lights use different amounts of watts depending on the type of bulb and the number of lights on the string. Incandescent bulbs use more watts than LED bulbs. For example, a typical 50-bulb string of incandescent Christmas lights will use around 25 watts, while a 50-bulb string of LED lights will only use around 4 watts. This is a significant difference in power consumption, which is why LED bulbs are becoming more popular for Christmas lights.