How this $18 flashlight is practically impossible to lose
The FlashMiniAIR micro flashlight is an essential companion ... levels and multiple modes—including emergency flash and UV ...
Recombu24d
10 Best Blacklight Flashlights
★【INVISIBLE BUT POWERFUL 365NM LIGHT】-- The 10W high power uv 365nm light is invisible to the naked eye, so that it is not as BRIGHT as the 395nm flashlight, but more perfect for demanding ...
Hackaday7y
Finding A Lost Tooth With Science!
Luckily, he had a UV flashlight handy and, after testing it on his own teeth, realized that his son’s tooth would fluoresce under UV light and the gravel wouldn’t. Off [John] went at night to ...