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View from the front
On - Off switch.
Here's looking at you.
Beam pattern.
Battery mounted on a bit of foam and then taped to frame. Rough and ready but it works.
12 Volt, 4 amp hour sealed lead acid.
View from the top.
Current regulator "pucks" are taped to head stem.
Front view.
With my old light still mounted.
Close up.
I mounted the two Luxeons on a bit of 1/8th inch aluminum plate. The plate is about 4 inches wide by 2 inches high. I used three small screws to hold each Luxeon to the plate. Finding the right screws is tricky as the screw heads go very close to the solder contacts. The lenses fit very nicely into some one inch PVC water pipe. The PVC pipe is 23 mm long, this sets the lens in place nicely.
The lens is glued to the PVC pipe and the PVC pipe is glued to the aluminum. The PVC encircles the Luxeon base and the three screw heads. I use silicon glue, so it can be pulled apart if required. Between the Luxeon base and the aluminum I use some heat sink compound to improve heat transfer.
To hold the aluminum plate to the handlebars I used a plastic electrical conduit holder (25mm I think).
I got a bit of glare from the light when riding so I taped a bit of cardboard on top to act as a shade. I'll replace this with something more sturdy eventually. A better design would be to just put a bend in the aluminium to act as a shade and it would also add to the heatsink area.
It works very well and is tiny.
The "puck" current regulators are simply taped to the headstem at present.
My 4 amp hour gel cell gives me over 5 hours of good light.