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These are cheap and nasty thingos.when you switch them on once they set
themselves, if you switch them twice in quick succession they stay lit, if
you switch them off,wait 10 sec.then switch them on once they revert to pir
operation, tried this and they do not work in sensing mode.
I was thinking of some suppressor to put in circuit to protect against
spikes.

That is not a bug, it is a feature (tm)

If you want to have the lights on permanently, you turn the power off
and on again quickly.

If you want to revert to normal operation, turn off for 10 seconds and
turn on again.

They are ment to work that way.

What do you mean by "tried this and they do not work in sensing mode."?

It is not spikes, which cause the trouble, it is the dropouts, which
turns the lights on.

Which means you either have to modify the lights to remove the feature,
or power the lights from an UPS.

Leif

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