Have You Ever Seen or Used a Christmas Bulb Tester Before?

If you're like me, you've never seen one of these contraptions in your entire life. No, it's not a taser. It's not some kind of Kligon torture device.

It's a Christmas bulb tester, and Greg swears they're bad ass. The very unfortunate news is when Woody, curious to see the thing and eager to try it out on a broken strand of lights, called Greg to see if he could borrow it, Greg couldn't find it. The illustrious Christmas bulb tester is likely gone forever.

So the question is: