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  1. #1
    Senior Member
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    Modding an incandecent dynamo headlight to use an LED

    I've got a dynamo headlight that works, but is really not very bright at all. It is almost identical to this one:



    I've ordered a Cree XR-E R2 WH and optic from Cutter, found a bridge rectifier, and got some old capacitors (3300uF) out of a broken power supply. So now I'm thinking about the physical aspect of mounting the components inside the headlight. Has anyone done this? Are there things I should watch out for?

  2. #2
    Velocommuter Commando Sirrus Rider's Avatar
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    Nov 2007
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    Houston, Texas
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    '88 Specialized Sirrus, '89 Alpine Monitor Pass, two '70 Raligh Twenties, '07 Schwinn Town & Country Trike, '07 Specialized Sirrus Hybrid
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    Quote Originally Posted by cbr2702 View Post
    I've got a dynamo headlight that works, but is really not very bright at all. It is almost identical to this one:



    I've ordered a Cree XR-E R2 WH and optic from Cutter, found a bridge rectifier, and got some old capacitors (3300uF) out of a broken power supply. So now I'm thinking about the physical aspect of mounting the components inside the headlight. Has anyone done this? Are there things I should watch out for?
    I guess it wouldn't be too different from the "Electra Bullet Headlight Hot Rodded With Cree R2 thread" Both housings are about the same size..
    Riding 19 Years of Specialized Sirrus Tradition.
    Live in Houston? Come to http://bicyclecommutehouston.blogspot.com/
    1988 Specialized Sirrus, 1989 Alpine Monitor Pass MTB, 2007 Specialized Sirrus 700C hybrid, 2007 Schwinn Town & Country trike, 1970 "Resto-Improved" Raleigh 20, 1970 "WIP" Raleigh 20, and 1980 "WIP" Schwinn Town & Country trike

  3. #3
    Senior Member
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    Thanks a lot -- search just can't compete with a person who's been following the board.

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