Someone asked me once if I had whitened my teeth when I was out, and I had. So I'm not sure if they knew, or does the blacklight make my teeth pop more, or d/t the chemicals in them?
Whitining strips won't make your teeth glow under a black light, all they're doing is bleaching your teeth (not actual bleach, just a bleaching effect). I mean, someone probably could tell if you're whiting your teeth, just because teeth are naturally not very white, but they're not gonna glow.
It has been found that the crest white strips are widely used to white the color of teeth. Knowing this fact, people, at present widely prefer such teeth whitening strips for lightening the color of teeth, but before applying such teeth whitening processes, people must be sure that all such teeth whitening processes do not become the reason of irritation of mouth. For more information, you must consult with the experts, who have adequate knowledge regarding all such aspects.