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I have noticed LED bulbs keep glowing for a short period of time after turning them off: https://www.quora.com/Why-do-LED-bulbs-keep-glowing-even-after-switchi

I have noticed LED bulbs keep glowing for a short period of time after turning them off: https://www.quora.com/Why-do-LED-bulbs-keep-glowing-even-after-switching-it-off-and-then-they-slowly-dim-out https://www.quora.com/Why-do-LED-bulbs-keep-glowing-even-aft... I imagine there is still some flicker, but it seems to be smoothed out pretty well on LEDs also.

phkahler 6y ago
I've seen that too. I think they're using a phosphor of some kind to convert UV wavelengths to visible light. That would have some persistence for those wavelengths.