If you have a little plastic bag of replacement bulbs for your Christmas lights, you may have seen a red tipped bulb in the mix.
Yes, it glows red, but it has another use.
If you replace a regular bulb on your tree with the red bulb, it will make the lights flicker.
Most of us with newer strings of lights tend to use a remote to change the way the lights flicker, but the red bulb removes the need for a remote.
