I just checked my Christmas lights and it looks like I'm going to have to replace almost all of them. The white ones work, but a third of them are out due to a missing bulb. Unfortunately the plug for the bulb is missing too, and it required a different plug when what I have spares of. The color lights aren't working either, and I think that is something wrong with the wires, because the bulbs seem to all be there and the fuses are all of.

At least they won't go to waste. I'm going to take all the bulbs off, check them, and keep the ones that work.

And most importantly, it means I get new Christmas Tree lights :)