The LightKeeper Pro is a Christmas miracle, especially when you’ve discovered the Christmas lights you carefully packed away last year aren’t working. But before you turn into the Grinch, save the day ...

Nothing ruins the excitement of decorating for the holidays quite like a malfunctioning string of lights. I’ve definitely made the mistake of putting a string of light on the tree or hanging them ...

Why is that you always test 48 bulbs before you find the bad one in a 50-light string? This simple circuit allows you to divide and conquer, greatly reducing the time it takes to find the bad bulb.

A long, long time ago there was a great Design Idea for a simple gadget to find a bad bulb in a series-connected string of Christmas lights: This is really simple and works great, but it exposes the ...