Nice thread! Are you open to suggestions of new lights to make? My first request is an ultralight 1aaa headlamp, like Manker E02H but lower lumens so less weight, and very thin headstrap like Petzl Bindi. I think weight of the whole light including strap but without battery can be under 20g. It is enough to have 3 modes: low (5 lm), high (50 lm), and strobe (headlamp users seem to want that). No need for 100+ lumen modes that kill the battery fast. User would choose between high CRI and high efficiency cool white led.