Size comparison 1

I dug out an old incandescent bulb from a dynamo bike light for comparison.

 

The led in the Mini Dyna Light is a Cree XPG R4, with should give well over 200 lumens at the rated current of my dynamo. The optics are not ideal, but its still at least an order of magnitude difference over what that incandescent bulb bulb next to it can generate.

Done