Here's the luminox I wear
http://www.ablogtowatch.com/luminox-...-watch-review/
Like others mentioned, it has tritium tubes and glows all the time. If you've ever seen night sights on a gun, it's the same technology. Won't glow in daylight but in dim/dark, it's nice and bright.
Hard to take a picture of what it looks like at night but roughly like this:
