led floodlights to replace elderly halogens - will PIR work?

[Jim K]

just looking to replace & add to old halogen 400/500w security floods around the outside.

If I swap to 20w LED ones, will the seperate controlling PIR detector function properly with a new load of say 40w compared to old of 800w?

thanks

Jim K

[Bob Minchin]

Depends. If there is an audible click from the IR detector when triggered then it is likely it contains a relay and it will work fine. If it is silent, then there could be some doubt as some electronic switches need a minimum load.

You could try a low power filament lamp such as a oven/ fridge bulb which are 15watt as a test.

[John Rumm]

If the PIR has its own power supply with both a neutral and live, then chances are it will work since its probably just a relay doing the switching.

PIRs that are designed to replace light switches and run without a neutral probably won't work (since they need to bleed their operating current through the lamp)