This is far better than the zinc sulfide and friends of my childhood. First off, total glow is stronger. Second, the glow is much longer, almost an order of m

This is far better than the zinc sulfide and friends of my childhood. First off, total glow is stronger. Second, the glow is much longer, almost an order of magnitude to my untrained eye. Third, you can get a lot more variations on color if you're willing to sacrifice glow time. The zinc sulfide of my youth came in green (typically) and red (very rarely) and, if it was paint, smelled bad.