It looks like your jumping into deep water without getting your toes wet first. Start small 3D print improvements to existing lights that have the functions you want. Good start 3D print slip over sleeves for armoring up the lights to improve water proofing, drop resistance and just general getting dinged up on hard use. 3D printed water proof battery holders. 3D print bezel standoffs and caps to protect lenses. You could do quite a lot to get good lights into great lights for caving or as some of us say around here “Dog walking lights” After that then build something great. Be sure to show off your builds here What did you mod today? Toss those improved lights into a pool to see how well your extras worked or just drop them a few times to see if that armor is true. Welcome aboard wski!