The Lupine Wilma is obsolete.

http://www.lumiledsfuture.com/produc....cfm?lineId=19

The Rebel in cool white is rated at up to 145 lumens at 3.9v/1w from an emitter that is less than 3mm x 5mm.

You could mount 6 of these in an area of 1 cubic centimeter (less area than a single K2 emmiter), producing 870 lumens (seems like a lot of heat to manage - gonna have to mount a liquid CO2 cartridge / regulator unit next to the battery).

Rebel emitters cost $2.50 eack in bulk, so that 870 lumens would cost $15.

Lupine's next generation light will probably use these, and they'll manage to add another $600 onto the price.

It does look like the end of HID is now in sight.

That little dot next to the end of a AAA battery is the Rebel emitter. I'll need smaller fingers and bigger eyes to solder that...