A decade ago I received a set of Reelights to try, and my mind was a bit blown. The Reelight SL120 uses magnets that attach to your wheels and as the magnet goes around your lights blink or build up enough energy to stay constant.
Yes, lights that are always blinking if you are moving without the price of a fancy front dynamo wheel.
The Reelight SL120 with a capacitor is what I put on my wife and kid's bikes. They are simple, mount to the axle so pretty theft-resistant, and a good price - especially considering I still have a set of these lights working from 10 years ago.
Please note that the SL120 does NOT WORK WITH DISC BRAKES.
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