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  1. #1
    Senior Member Rick Smith's Avatar
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    Adding an extra generator headlight?

    Hello,

    Is it possible to add another headlight to a Shimano Nexus Dynamo Hub? The Azor 108 I'm riding has a hub that powers an LED rear light and a Lumotec headlight. I'd like to add a second headlight at the front of the front rack (see below):



    But it looks as if there's only two 'prongs' (I'm no electrician nor a mechanic) for the light units:



    Would I be able to swap out this part for a 'three prong' part?

    Or is the hub even able to power three lamps?

    Thanks for any help provided - need more light -

    Rick

  2. #2
    Year-round cyclist
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    You could do it, but it's a bit tricky. I suggest that you read Peter White's pages on lighting (look for "Secondary" Lumotec and E-6) and to the wiring instructions. Most of what he writes is also true for the Shimano generators.


    A few things to note.

    1. The lights need to be fed in series, not in parallel.

    2. For the secondary, you need the special "secondary" headlight which is wired differently. When you turn the Secondary OFF, you actually short it. Alternately, you might install an unswitched headlight, except it will always be on when the main one is on, and it won't be bright until you reach 18-22 km/h.

    3. Because the Shimano hub is not insulated, you'll need to insulate the Secondary light: i.e. install it on some kind of plastic bracket.

    4. Depending on where you ride, you might get equally satisfying results by replacing your current Lumotec with a Schmidt E-6 headlight. It's expensive, but it's an awsome upgrade.
    Michel Gagnon
    Montréal (Québec, Canada)

  3. #3
    Senior Member Rick Smith's Avatar
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    Thanks, Michel. Sounds like I may need to simply add an auxilliary battery-powered headlight.

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