This instructable will show you how to construct a LED based headlight for a Velomobile.

I replaced the standard headlight on my home made 'Alleweder' Velomobile with two Luxeon power leds with two different lenses, one for a small bundel for long distance illumination, the other with a broader bundle for close distance.

Step 1: Parts Needed

here is an image of the parts you need

Step 2: Mark Position of Leds and Lenses on the Heatsink

mark position of LEDs and lenses on the heatsink and drill the holes.

Step 3: Place the LEDs

After drilling the holes, first apply some heath conductive compound.
Then screw the LEDs on the heatsink, and solder them together in series.

Step 4: Connect Electronics

Now you can solder the PCB with the buckpuck LED driver according to the diagram.

Step 5: Put It Together

First fix the lenses, glue them to the case using a glue gun and put the PCB into the case. Some isolation foam is used to keep the electronics from the case.

Step 6: Finally Mount the Headlight Into the Bicycle

The headlight is mounted into the velomobile. It get is power from a battery and is switched using a switch on the dashboard. details about the construction of the velomobile can be found here.