i've read that the glow isn't rated for emergency signage, which kind of kills my draw towards selling it to my clients for wayfinding. emergency lights will negate the glow, so reflective/illuminated has always been my way to go.
however, I do have a client that is insistant on photoluminescent signage despite my tempering his expectations in regards to performance, so I'm also interested in everyone's suggestion for brands.
noted: The stuff gets a heck of a glow with indirect black-lighting, but so does fluorescent vinyl, if that matters at all.