Eeyore writes:

PeterD wrote:

Your switches are wired wrong (they are switching the neutral (or
cold) side of the line, not the hot side.

Makes no difference. When the switch is off, the circuit is broken.

He said there are 2 or 3 switches controlling this lamp. In that case,
there are a variety of ways that there could be capacitive and inductive
coupling. Very often, there is a "traveller" with 2 parallel wires in it
one of which is connected to the source and the other is connected to the
lamp when it is off.

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