When looking for glow-in-the-dark photoluminescent paints, it is highly recommended that you verify that the products meet ot exceed the New York City MEA 451-05-M-2 Standard for LL26 Safety Evacuation Markings. These aren't the only certification for products, but it is one of the most common and well publicized references out there.
Also, note that some products don't use the Stontium Aluminate (SrAl) based pigments, either. The products by GloNation, although very cool and helpful for special effects, use phosphorescent dyes; and the Rustoleum 214945 'Glow-in-the-Dark' Latex paint, which uses zinc sulfide (ZnS). Many of the cheaper photoluminescent Low Location Lighting (LLL) systems in use today are based on zinc sulfide (ZnS) as the main pigment. The advantage is relatively quick charging, but these products have a limited 'storage' life and the ZnS corrodes over time (2-4 years lifespan). It also doesn't glow as long or brightly after being charged. However, the introduction of Stontium Aluminate (SrAl) as a pigment, has provided a much higher level of performance. Although it takes slightly longer to charge, it can 'store' more light, making it much more suitable for use in locations where ambient light levels are low, or dark for extended periods.
Lastly, in order to get a good bright glow paint treatment, it is very important to follow the manufacturer's directions (you know: RTFM! ).
- Most of them require a bright white base coat so that there is a reflective surface behind the paint to assist the glow. If you paint the glow material over a dark surface, then the glow that emits from the back-side of the coating will just be absorbed into the background instead of reflected back out through the nominally transparent glow paint coating.
- Apply several coats of the material to build-up a few mils of paint thickness. One thing you will notice with most photoluminescent products is that the brightness of the product is related to the thickness of the product (it is also related the formulation).
- Apply a clear coating to protect the photoluminescent coating. Otherwise it will eventually scrape-off or wear-off. This stuff ain't cheap, so make the effort to keep it intact.
American Permalight (http://www.americanpermalight.com/) - Spray paint, Acrylic Wall paint, and 2-part Epoxy & Polyurethane paints
GloTech International (www.glotechint.com/paint.htm)
GBC Coatings (www.gbcsafetyglow.com/glow-polyurea-photoluminescent-glow-in-the-dark-safety-floor-marking-coatings/industrial-photo-luminescent-floor-striping-and-coating.html)
Metal Safe Sign International (www.mss-int.com/prod01.html)
ProLayer Inc. (http://www.prolayerinc.com/)
Get samples. Apply. Test - for a really long time - say . . . 12 hours. Buy the one that works best.