I'm still amazed by the Doug Ritter lights; excellent. Only thing I'd like is a red beam option. A photon with that is on the way from the US.

For now I got from Wilko in the UK; their own head lamp with 2 bright white LEDs and a tiny red one. If you want to use as little light as possible the red one would be ideal since you won't lose your night sight.
Only £3 and I've found Wilko stuff decent quality.

How many lumens is the Doug Ritter light by the way?

qjs