On Aug 28, 4:16 pm, David Johnson wrote:
snip
The shop keeper doesn't seem to think
they're all that good or reliable.

Cheap ones can be a bit crap - they tend not to put out much power,
fade rapidly as speed drops, and be noisy and of pretty poor quality.
Unless you're buying them as a complete throwaway, the cheap ones
should be avoided.

Hub dynamos are, by general concensus, the best type of dynamo, but
you need to get a wheel built up around them - requires a bit of
thought.

The best compromise (IMO), is a good quality bottle dynamo setup,
preferably complete with standlight. Rose Versand (Germany) is a good
place to look.
http://www.roseversand.de/output/con...=2&detail2=135

Tellingly, they catagorise "lighting" under "bike parts" rather than
"accessories".

hth,

bookieb