This emergency lighting module from AliExpress, has quite novel circuitry to allow it to have a lower current storage mode and a very decisive end of illumination shut-off.
As with many of these units, the circuitry is traditional discrete stuff with no fancy ICs.
The main power supply is a capacitive dropper, which makes sense for a low power device like this. For 220V-plus countries I would suggest swapping the dropper capacitor for a lower value one like 470n, and also remove the existing 220K discharge resistor and tack a 470K or higher one across the capacitors pins.
Clever circuitry though, with a neat self latching feature.
At the end when I was suggesting modification for a 200+V supply I said 470uF instead of 470nF. That would be quite exciting, but unproductive. The correct value would be 470nF to reduce the charge current and the zener diode's heat dissipation. If replacing the discharge resistor across that capacitor with a more appropriate 1 megohm (or two 470K in series) one I'd suggest removing the original surface mount component as it is running hot.
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