Received this light this morning for an upgrade from a fellow CCR diver.
The customer wanted a tightly focused beam suitable for murky conditions so we decided on using an aspheric lens to tightly focus the beam with no side spill that could cause excess back scatter.
First step was to make up a heat sink.
Second was to make up the lens holder.
Third was to wire it all up.
First pic shows the LED which is a Cree XM-L, 3 mode driver, aspheric lens
heatsink and lens holder.
This last pic is a beam shot of another light using the same components.