SuperNinja said:
This one is pretty small.
http://www.dealextreme.com/details.dx/sku.52
I use it often when I am working on computers.
IMHO if you're going to go for a single LED, the best bet is the coincell lights from DX. However, that light doesn't look like a bad candidate for smallest Seoul/Cree powered light as a mod
.
I referred to a post earlier, but I'll go ahead an duplicate the images of some of the modded DX lights I have. On fresh batteries, these modded lights put out as much light as a stock Elly, nearly 20 lumens. This is definitely overdrive (about 80mA), but for momentary burst, they are truly awesome.
Coincell lights from
Dealextreme, more efficient LEDs to drop in are available from
here.
Left - White JELED
Center - Stock DX White (looks very blue)
Right - Red JELED with 2032 battery (should have about double the runtime of the others)
"Whitewall" beamshots from each -- the white ones appear much brighter in reality (the above appears more lifelike)
This is one of the 5mm LEDs where I sanded down the "dome" completely flat using 600 grit sandpaper, it produces an even flood beam which is great for reading in the dark:
THREE of these on my keychain is less cumbersome than most 1xAAA lights, or even many of the skinny button-cell lights.