I always say buy quality once and don't regret it. Dyno hubs are the way to go.
Originally Posted by
Hot Potato
How many lumens does a typical dynamo hub / light throw?
edit: at say, 18 mph?
Depending on your light, you could be getting 600 lumens at that speed.
This site
shows that at 18mph, most dynos are at max wattage.