A simple light enhousing which I designed in OpenSCAD for all those MR16 LED spots I had lying around from previous bike lights. I printed them in PETG with 100% Infill. Time will tell how well they will last if exposed to the element. Even today with all

those cheap LED lights available on Ali, Deal Extreme, etc. such MR16 LED insert IMO are still a valid option. They are very cheap, run from 3s up to 4s LiIo-packs and you can easily connect them to your e-bike battery with some of the cheap DC-DC

stepdown converters. I soldered two wires directly to MR16 insert and made a knot in the cable to avoid slipping out. For glueing the light into the housing I used some marine sealent I had laying around from Sikaflex but anything should do.

Mounting to the handlebar is easy by using any of the many adapters available from Busch & Müller, Lupine, Supernova and others.

Update: Since I broke of one MR16 lights holder during an accident I printed a repair holder which can be easily be attached to a light with small screws and epoxy. Also I added a modified housing with air slots for more powerful LED lights like the 7W Philips spot I recently ordered.