I once had a 'haunted' fluorescent bulb.
It started lighting intermittently (~1s) when switched off.
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FeralCatMan Long ads need comments sections, Mon 25 Jan 2021, 21:02,
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Fluorescent lamps are powered via a 'ballast' circuit to limit the current supply.
They may contain capacitors which could store sufficient charge to power the lamp for a short duration after the supply voltage has been removed.
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Happosai _,,,,_(O ; o)_,,,, Mon 25 Jan 2021, 22:31,
Reply)
I'd thought of a capacitor, but it did it repeatedly.
My guess was some sort of current leakage allowing it to recharge. It died a few weeks after.
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FeralCatMan Long ads need comments sections, Mon 25 Jan 2021, 23:54,
Reply)