If you can live without the adjustable focus then some of the smallest 18650 lights are the Zebralight SC60 and Shinginbeam's S-mini.
I would guess that adding an aspherical lens with adjustable focus is going to increase the size of the light quite a bit. Is having a dedicated thrower (aspheric) and a separate floody beam light practical for your circumstances ?
I have messed around with both the R5 and XML S-mini. It's a great light: perfect size, nice clip, but I really want a lens on it. When doing regular treatments in rooms, I turn it to flood and point at the ceiling. When I don't want to wake my patients, I want to be able to turn it to a low mode and just shine on equipment for spot checks.
Romisen RC-C8 II R2 Flood-to-Throw (Shiningbeam)
or CR123 an EDI-T11 (DX)
or AA/14500 Sipik SK68 clone, they often go for $5.50 on ebay if you are patient
I own the Sipik SK68. Great light, wrong battery. In fact, that is the light that has been running out on me with the 14500 / XML swap.
EDI-T11 seems exactly like the EDI-P4 I mentioned in the original post, only it's CR123... which wouldn't last a full shift. I think 18650 is the only way to go.
And the Romisen RC-C8 has that super annoying twist-to-zoom that takes two hands and several turns to go from flood to spot. I just can't get around it (I have the AA version).
I feel kind of bad for being so picky, but I suppose that's the point of this forum. I have been questing to find the "perfect" light for a while now, so that's why I have finally posted here. I have been having issues with the hunt! So... is anything comparable to the EDI-T P4? It seems like the winner, but everyone who has been ordering them lately is getting the (worse) thicker AAA version by mistake.