Here are my "high power" keychain lights. Both the Larry Light and Anglepoise/George light use a Luxeon emitter, and are capable of about 350mA drive current from a primary CR2 Li cell. Both of these lights are EXCELLENT at what they do. And I tend to use these little lights more than the big, super-duper jobs that sit on my shelves.
The Larry Light was made to be the ultimate minimalist CR2 light - or "low cube" as Larry calls it. It is significantly smaller diameter and shorter, and has a two-level twisty switch. It uses a modified Luxeon secondary optic for collimation.
The Anglepoise "beauty" has a uC boost circuit with the latest version of the UIs that George and I developed. Five levels are available, and there is instant access to high, a force level can be set, and it can automatically "sleep" if left on. Switch is integrated into the circuit, and is one the side of the light. A custom "Don" reflector is used for collimation. Design, machine and assembly work by Angelopoise (CPF). Miniature uC driver designed, assembled and programmed by George and the UI developed by George and me. Details on David's site here.
The Larry Light is the anodized one (for those unfamiliar)..
Both on low. Hair, of course is for scale. As are the lint specks.
The butt ends.
And then... images swiped from George. The Beauty next to an
AA and CR123.
I added a tritium marker to help find the switch in the dark!.
The micro driver and George's giant pinkie. You are viewing
2/3 of the one in existance.
The custom programming pogo.
Time to Modify!
I swapped in a U-bin SSC for the T-rank Lux1 that the light was made for. Before and after shots, though without exposure control, nor a tripod to frame them evenly.. In reality, the very center of the beam was roughly equally bright. Before there was tight hot spot and dim corona. Now the hot spot is huge and bleeds evenly into the corona - offering more of a wall of light.
Roll over:
First, remove everything, including the "factory" installed T-rank Lux1.
I then soldered on some smaller gauge wire, and reassembled with a U-rank SSC emitter. Shown here in position before soldering.
This light has now made it through the wash twice, and once through the dryer! The only damage? The tritium vial broke, and I had to replace it. The light never faltered.