In article . com,
dcbwhaley wrote:
. You do,
however, need a neutral.

Two ways to get away without a neutral.

The naughty way is to to connect to earth instead, assuming that the
lights aren't RCD.

The current is so low it won't trip an RCD.

The nice way is to use a two way switch and put the neon between L1 and
L2. When the lamp is on - one side of the neon is unconnected so it is
off. When the lamp is off the neon is in series with the lamp which is
low enough resistance to neutral.

Or just wire it across a one way switch - the result will be the same. But
most want the warning neon to be on with the light.

--
*Lottery: A tax on people who are bad at math.

Dave Plowman London SW
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