What You Do
Tear off two strips of tape. Stick the pieces together with the sticky sides facing each other, leaving enough tape so that you can pull the strips apart. Turn out the lights. Give your eyes a minute or two to adjust to the dark. Pull the strips of tape apart.
Did you see the blue line where the tape separated? This is triboluminescence, which is a type of luminescence triggered by mechanical energy or electrical energy from an action such as friction. You can get the same effect from other types of tape as well. A good one to try is transparent Scotch™ tape. If you have a hard time separating strips of tape with their sticky sides together, you can see the triboluminescent glow simply by pulling the tape (quickly) off of the roll, thought the light will not be quite as bright.