Bike Light

A 100w water cooled LED with collimating lens has been mounted to the front of my mountain bike for night riding. It is indeed brighter than my car's headlamps.

The case was custom cast from a two part clear polyurethane (Smooth-on crystal clear).

Two lights were built, one for me and another for my friend. The second version turned out much sleeker as it used a reflector instead of a protruding collimating lens.

The water pump and its associated circuit fit inside a water bottle while the 8x18650 laptop battery cells fit inside two polycarbonate sleeves.

The light I built for my friend who works at SRAM.

An image showing the various steps from design to final product.

Light on

Light off

The submersible pump which fits inside the water bottle requires 6v while the light requires 32 volts. To prevent using two power sources a step down buck converter is used to power the pump. A watertight case for the circuit was 3d printed then installed inside the water bottle with the pump.

A new bike warranted some upgrades to the system.