I have 3 strands of C-9 Christmas lights on my roof and I keep blowing the fuse on it. Each bulb is considered a lamp. The reason that the whole string of Christmas lights fail when one bulb burns out is because of the way the lights are wired. One of the lights keeps blowing out. Not immediately but after a few weeks or a month. By the Big Three light bulb manufacturers, I mean General Electric, Osram/Sylvania Do not use them for closet lights or refrigerator lights. I have one light that keeps blowing out incandescent bulbs. I have one light that keeps blowing out incandescent bulbs. some light bulbs stick in the fixture? Where do you purchase fuses for Christmas string lights? At a hardware store. Where do you purchase fuses for Christmas string lights? out or in some cases moisture in the bulb housing Who invented the string of electric Christmas lights? I have 7 of those 25 bulb (type C7) Christmas light strings strung together that I've used on the exterior front of my home for 7 years.
