3-second lume charging

Thread: 3-second lume charging

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  1. #1
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    3-second lume charging

    Hello,
    i recently realized that luminescence charges very quickly (in as little as 3 seconds) when exposed to ultraviolet light. I have not extensively tested this, but it may be helpful if you want to take in-the-dark shots of your watch.
    I hope this is useful to someone!
    Hello, I'm Igpay!

  2. #2
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    Re: 3-second lume charging

    I also noticed mine charges very fast (3-5 sec) when I put it under a fluorescent bulb. Much better than incandescent!

  3. #3
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    Re: 3-second lume charging

    Maybe it was the fluorescent part, as opposed to the UV part? Is there an explanation?
    Hello, I'm Igpay!

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  5. #4
    Member JohnF's Avatar
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    Re: 3-second lume charging

    Hi -

    The lume in modern watches absorbs energy in the form of photons and slowly releases this energy over time. UV is very energetic, short wave-length light - UV is what gives you sunburns - and hence the very short loading times. Don't know about flourscents, though...

    JohnF
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  6. #5

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    Re: 3-second lume charging

    So, is this feature available in all modern watches?

  7. #6
    Member JohnF's Avatar
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    Re: 3-second lume charging

    Hi -

    Not in watches with tritium lume, but in most others. Depends on the lume used.

    JohnF
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  8. #7

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    Re: 3-second lume charging

    Quote Originally Posted by JohnF View Post
    Hi -

    Not in watches with tritium lume, but in most others. Depends on the lume used.

    JohnF
    Got it

  9. #8
    Member SquishyPanda's Avatar
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    Re: 3-second lume charging

    Quote Originally Posted by igpay View Post
    Maybe it was the fluorescent part, as opposed to the UV part? Is there an explanation?
    fluorescent bulbs release a lot of UV. Not enough to give you cancer or anything, but definitely more than an incandescent bulb, which throws off a lot of light in the infrared end of the spectrum (low-energy [low photons] long wavelength). That's why incandescent bulbs get hot and fluorescents don't. Tanning booths use specially-designed tubes that pump out more UV. I've heard of people using blacklights to charge lume for photos. I don't know if blacklight tubes release *more* UV or if they just don't release a lot of visible light.

    Has anyone tried using any other types of light to charge lume? Mercury vapor? Those yellow parking lot lights? Burning magnesium?

    A graph of the different spectrums put out by different types of bulbs would be interesting...


  10. #9
    Member dcom's Avatar
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    Re: 3-second lume charging

    I've had really good luck charging it with an ultra bright LED flashlight, particularly one like a Surefire L1 or Fenix P3D. :)

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