Lots of neat light tech I'd be interested in, but I'd start with a ZL H600w or H600Fw, H style pocket clip for it, and an Emisar D1 XPL-HI neutral emitter.
There's two compact and powerful lights with good range of levels, both 18650, one floody with a head strap and pocket clip, the other a throwy hand held light that's compact for easy jacket pocket or back pocket carry.
Not counting batteries and a charger that's around 150$, maybe kind of pricy but you can see really well, for a long time, hands free, two different beam profiles cover most needs, two lights, same batteries, sturdy, compact, low mass.