thefathippy wrote:

hehe - I went with batteries (and making my own lightsets) after being
done faffing about with dynamos!

To be fair, it was a long time ago, and I'm sure they're better now,
but I was getting less light than a burnt match going uphills,
BTDT

and blowing bulbs going downhills.

Zener diodes.
Some of the better lights actually had them built in.