I work as a bicycle cop and we use material that reflects light but doesn't glow. I have strips of it on my uniform so that cars don't run me over at night. The material is called retro-reflective. You will see it on the traffic vests worn by highway workers and cops. You sometimes see it on firefighters clothing as well. The material on road signs doesn't glow, it is along the lines of the retro-reflective clothing as it only reflects the light that is shined on it.

You can buy this stuff as tape or material to be sewn on clothing etc.

Originally Posted By Jimshaw
Alex
I think what you mean is highly reflective paint, or does it actually glow in complete darkness?

Eric points out that glow tape must be charged and gets dimmer.

"Real" glow paint had radium in it to continuously charge it and isn't readily accepted by the EPA.

My dogs vest has some reflective tape that shines like a spotlight in a light beam. So if you need to find it without a light beam, you need a chemical that absorbs light and slowly re-emits it and as I recall from my childhood it gets dim quickly.
Jim