Electronics, Lighting, & GadgetsHRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.
https://canoe.com/technology/review-laser-bike-light-can-help-you-stay-safe-while-riding-at-night
I'm getting a feeling of déjà vu , this is not an original idea.