Fenix PD40 Afterglow

Photon · Apr 21, 2015

Around the house, I usually use my Fenix PD40 (very fine light BTW) in the lowest, 20 lumen mode. When I turn it off, the emitter glows softly for a bit. This is not glow-in-the-dark material around the reflector that some lights have. Anyone else notice this?

markr6 · Apr 21, 2015

Yes, I've noticed that in several lights - Zebralight SC600, EagleTac S200C2, and some others I can't think of at the moment. Maybe all of them? Not sure why it happens.

CarpentryHero · Apr 21, 2015

Most led flashlights do that, led bulbs for houses do it too.

I'm not sure what causes it, likely a gradual cut off of power would be gentler on electronics

Photon · Apr 21, 2015

I don't know why I never noticed it before. I've dozens of LED lights.

TheBelgian · Apr 21, 2015

Seen it as well. My bet is its afterglow from the yellow phosphor. You'll notice the afterglow is always yellow (or orange for neutral white). The LED phosphor is basically a very short duration glow-in-the-dark material, so a little afterglow is nothing unusual. With a red, green or blue LED there should be no after glow.

Fenix PD40 Afterglow

Photon

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markr6

Flashaholic

CarpentryHero

Flashlight Enthusiast

Photon

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TheBelgian

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