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Marwi Halogen Bike light
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I had four of the these Marwi View Point Halogen
lights laying around. Performance used to sell
these lights and there are thousands of
them out there. They are pretty cool little lights.
They are very light weight and they have a rubber
sealed push switch on the back. I got curious
and took apart a P7 flashlight to see if I could
fit the LED inside the halogen light. To my surprise,
they were exactly the same size glass and the
reflector fit perfectly inside. The halogen bulbs
that were used in these lights had the front glass
piece glued right to the halogen reflector and
so I popped in the P7 flashlight glass and reflector.
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All that was needed was to make an aluminum heat
sink/LED holder. You can see the piece that I
turned on my lathe above.
The outer diameter fits snug into the Marwi light
and is in contact with the outer surface. This
should draw heat away from the inner piece to
the outer shell.
The wires pass from the LED, through the wall,
to the rear of the light
Left: The LED sits down into the heat sink.
Right: The backside is hollowed out to keep the
mass low which aids in shedding heat.
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Here's all the parts.
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Wires soldered to LED and switch.
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Front view
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Side view
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