It might be the best thing ever! 

I saw the commercial in TV, and I happened to be shopping for a tree topper and ran across it.

I wish I would have come across it a week ago, before I replaced half the lights on my tree.

It's the Light Keeper Pro! Basically, you plug your light set into this "gun", and it detects the bad bulb. It then fixes it, and you are on your way.

Hey, might make an awesome stocking stuffer too!

Here's how it works!