less current means less resitance from the dyamo/generator..
I like it :)

I hate rim dynamos. Auckland's hilly enough without the extra work.
A 6V gel cell, even a smallish 3Ah one, will last a long time with LEDs

You may have seen Russell McMahon's I'm-gonna-spoil-your-day
reply to my idea of using an induction system to recharge the battery.
I never did thank you for that did I Russell  :<  Sigh, pipped at the
post again

I've put a couple of pictures up

http://home.clear.net.nz/pages/joecolquitt/bikelamp.html

On the left is the lamp from about 10ft. On the right (not the easiest
pic to get right), the illumination on a grey wall from 20ft. Underneath
shows how the LED is mounted using stiff wire

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