I needed a replacement headlight for my Engwe M20, but didn't want some awkward oversized motorcycle headlight and I also didn't want to run an external voltage regulator. This light is not only the perfect size for a typical E-Bike, but it is capable of running directly off battery voltage. I was able to wire the low beam into the stock headlight circuit and add a secondary switch to toggle the high-beam. As in some other reviews, I measured the wattage which was around 20W with low beam and 30W with high beam. My unit does not seem to heat up readily, and the metal case certainly helps with keeping it cool. The headlight pattern is also acceptable, with the low beam having a sharp horizontal cutoff.Unfortunately, I needed to design an adapter to fit my particular style of fork mount. I made up a 3D printed shim to use the two M4 mounting screw locations and convert it to a single large 10mm bolt. If you're interested in this adapter, search for it on the Printables website.