This is a dynamo by another name with an LED light designed to run off
a dynamo (i.e,. built in capacitor). Interesting dynamo design. Seems
like a good LED light product.

Wonder if there is extra spoke wear from these? How many magnets will
fit on the 20" tires?

I searched all over the reelight web site to see the output in lumens.
There's little technical detail available. Before spending this much
money, I strong recommend you request the lumen output before buying.
Compare that to an small LED flashlight with the same output.

My experience is that many LED bike lights are too weak for daytime
use. Do you want to use the reelight as a daytime safety light?

73/gus