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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!
 

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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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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...
 

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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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