how do you find a bad bulb on christmas lights

It can be tricky to find a bad bulb on Christmas lights, especially if there are many bulbs on the string. However, one way to find the bad bulb is to use a continuity tester or a multimeter to check for continuity between the two ends of each bulb. If there is no continuity, then that bulb is the one that needs to be replaced. Another way to find the bad bulb is to turn on the lights and look for any bulbs that are not lighting up. If there is a bulb that is not lighting up, then that is likely the bad bulb.