Take a friend caving, give them memories that will last a lifetime…good plan! 
I got to do a number of wild cave trips years ago, even spending the night in one in a region that was mostly undeveloped and still had a fair amount of unmapped areas inside. Had to drop through some holes in the floor, almost like someone had drilled them out for people, and belly crawl for a long way in an extremely tight low passage that was only about 20 to 24 inches high (had to remove packs and drag them beside us) but anywhere from about 100 to 250 feet wide. It was 18F outside but a nice balmy 58F underground. Many people will never experience such utterly still air and absolute blackness like deep in a cave…pretty incredible. Coming to the surface after almost two full days was like walking into the brightest light known to man. lol
I’ll be interested to see what you come up with and how the light looks with new emitters if you care to share later. Either in your thread or you could also add it to the What Did You Mod Today thread here: What did you mod today?