Superluminova

SuperLuminova is the brand name for strontium aluminate-based material that provides the long-lived glow often seen on divers' watches. Previous lume was based on zinc sulphide; this is easily ten times better.

Check out this chart:

(Image credit: http://www.rctritec.com/)

There are multiple grades and colors, and brightness can be increased by applying multiple layers of lume. Lum-Tec uses six layers, and their watches are superb.

From their forum, how they do it. Base layer of super white TiO2, then lots and lots of SL: (click for fullsize)

See also [tritium lume] and Measure luminosity.

Here's a PR picture from the Lum-Tec C1, which uses six layers of superluminova:

Good stuff. On the SCWF, there was this thread where Seiko engineer Ikuo Tokunaga chimed in with this diagram:

Note that Lumibrite is Seiko's name for SuperLuminova, same formula. As you can see, it's awesome bright! I hope to measure this soon.

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