> Lights used to be dynamo powered (and go out when not moving). Now, $5 devices will provide more light than what we previously had available, and are more rel

> Lights used to be dynamo powered (and go out when not moving). Now, $5 devices will provide more light than what we previously had available, and are more reliable. Credit for that really belongs to LEDs. Dynamo lights sucked because the bulbs were 1/10 as efficient as modern ones. Standard alkaline batteries are quite sufficient for bike lights.