Ah, you're looking for advice on how to change the fuse in Christmas lights? Well, it's actually a pretty simple process. All you need to do is locate the fuse box and turn off the power to the circuit you're working on. Then, you can safely remove the old fuse and replace it with a new one. Just make sure you're using the right size fuse for your lights. Once you've done that, turn the power back on and voila! Your lights should be working again. Happy holidays!