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created4this t1_j2o9h5c wrote

It’s worse than that, a standard (cheap) dc supply as used in a LED lamp uses a capacitor to limit the current as the capacitor charges and discharges on the AC cycle it lets a small amount of current flow, but if the AC signal is not smooth then the capacitor and the rest of the circuit get the electronic equivalent of jerk on every cycle, which stresses everything and will rapidly lead to failure.