Green Lantern Headlight

A followup on yesterday’s post, in which Cabell wondered about the Green Lantern headlight. It’s actually cyan — I built it using directions from The cyan LEDs have peak emission at about the same wavelength that your rod cells have peak sensitivity to, so it’s the most efficient night lighting.

The other day I was on my way to work and passed my colleague Jim Champine, who was out for his morning run. He yelled “Green Lantern” at me. Then it turned out that my department chair, Bill, was a huge Green Lantern fan as a kid and still knows the magic poem that he used to recharge the ring. Or whatever. My recollections of green lantern are pretty vague.

Anyway, here’s a video showing my bike (leaning against the back of my pickup truck) with new front and rear flashers and the Green Lantern headlight. I think you’ll agree that I’m visible.

5 Responses to “Green Lantern Headlight”

  1. Travis says:

    It was an OATH, not a magic poem. :-/

    There are several versions but the one I know best is:

    In brightest day, in blackest night
    No evil shall escape my sight
    Let those who worship evil’s might
    Beware my power, Green Lantern’s light

    For more information:

  2. Allen says:

    Yeah, well, I told you my recollections are vague.

  3. Erin says:

    I like the blog facelift, btw. :)

  4. Allen says:

    I’ve changed to this plain vanilla layout because I’m planning to update to the newest software release, and my old theme had some compatibility problems. I haven’t actually had time to do the installation yet, though.

  5. Erin says:

    I guess I didn’t see it as plain vanilla — I saw it as clean. :)
    I look forward to seeing your cycling banner back though.

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