Evening all

Been to a customers house last week who have got 2 x security lights out on the front of the house.

They are the twin 150w type with one PIR.

They are fed from the same supply/switch and come on at night when they detect motion.

The weird thing is that they flash maybe 15-20 times just before they go off? Not a flicker, but a controlled flashing sequence.

I don't know the make and haven't checked the supply, but just wondered if any of you guys have come across this before?

I think the sensor is faulty, but its a bit odd that both have gone in the last 3 months. The fittings are 5 years old.

A friend of the customer who works for a lighting company has said he thinks the relay has gone??

Any ideas would be greatly appreciated.

Many thanks in advance.

GJH

This might be a long shot, but are there any wireless devices? For example, if you have a battery powered PIR that switches a remote lighting reciever, a series of flashes could be an indicator code for something like a 'low battery' warning.

Hi GJH
Have they a shiny new van parked near them? Or have they had a conservatory fitted ?
Reflections....

Regards
Ady

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Resistance is futile.

They don't like cold weather.

Andy

I've seen PIRs do odd things when they can 'see' a lamp that they're controlling - either the heat coming/going triggers the PIR itself or the light upsets the day/night sensor.
- Andy.