Maybe to attract bugs up to the lights instead of buzzing customers below? I have not seen these "black lights" personally, unless for bug zapping and eye annoyance , makes little sense to me why they would use them, the light they create is not something people can use to see, it is out of our range of sight.
I did find this here - Dec 01, 2019 · The bitter flavoring of tonic water is due to the presence of quinine, which glows blue-white when placed under a black light. thought it curious considering the current topics. heh If on highways, maybe Black lights combined with cameras to more easily snap shots of the license plates?
Maybe to attract bugs up to the lights instead of buzzing customers below? I have not seen these "black lights" personally, unless for bug zapping and eye annoyance , makes little sense to me why they would use them, the light they create is not something people can use to see, it is out of our range of sight. I did find this here - Dec 01, 2019 · The bitter flavoring of tonic water is due to the presence of quinine, which glows blue-white when placed under a black light. thought it curious considering the current topics. heh If on highways, maybe Black lights combined with cameras to more easily snap shots of the license plates?