On 08/12/2012 19:39, Nick wrote:
I want to install some security lighting externally around my workshop.
5x 150W tungstens with standalone but linked PIR's would do the job.
All lamps lit if one PIR is triggered. I think most will cope with 750W
load, if not I'll include a relay in the circuit.

To ease running costs and maintenance I am thinking of led floodlights but
have no experience of them.
For the purpose they must be instant-on.
Are led worth considering, or should I stick with tungsten?

Also any suggestions for reliable PIR's? I have one, Philips I think,
installed 27 years ago and still working perfectly. Since then, others I
have installed seem to fail almost annually.

Thanks,
Nick.



If they are security lights and are only on a few minutes each night its
a lot cheaper to use tungsten as the running costs are a few pence a year.
If you intend to work by them the electricity bill starts to build up
and makes LEDs look more attractive.