Oh, burned-out Christmas light bulbs can be a bit of a nuisance, but with a bit of patience and ingenuity, you can usually find a way to replace them. One thing to keep in mind is that there are usually two different types of light bulbs for Christmas lights: incandescent and LED. If you're dealing with incandescent bulbs, you can usually find replacement bulbs at your local hardware store or online. LED bulbs can be a bit trickier to find, but they're also more energy-efficient, so they're worth the extra effort.