On Sat, 8 Dec 2012 19:39:18 -0000, "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.


Steinel have a range of good quality sensors and floodlights (both
halogen and LED). I have used their separate sensors and halogen PIR
floods for around 15 years without a failure so far. They are quite
expensive but, unlike the floods sold in the sheds, they are reliable
and do last well. I tend to use TLC for most electrical stuff and
they stock a reasonable range of Steinel and other cheaper makes of
PIR kit.
--
rbel