An exception is bikepackers, who may prize reliability and runtime over brightness and weight. But then the dynamo we're talking about is $200-$400 and that's not including the light.
> An exception is bikepackers, who may prize reliability and runtime over brightness and weight. But then the dynamo we're talking about is $200-$400 and that's not including the light.
No, it's about a tenth of that, light included.
Though you can get Shimano Dynohubs pretty cheaply:
https://www.sjscycles.co.uk/hubs-front/shimano-nexus-dhc3000...
Dynohub history rabbit hole for those interested:
https://www.sheldonbrown.com/dynohubs.html