Johnny OneSpanner wrote:
"Donwill" ""diddle\"@popple,dot" wrote in message
...
Johnny OneSpanner wrote:
Hello -

In response to local burglaries, some relatives have been advised by the
police to install a dusk-to-dawn low-level floodlight in their small (15
metres across) farmyard., which already has motion-activated halogen
lamps.

The police recommend a sodium lamp, but are the CFL-based floodlights
also
suitable?
Sodium lamps with dusk-til-dawn sensors seem to be quite thin on the
ground,
should I use a separate sensor?
Can anyone comment on whether these might be suitable?



http://www.screwfix.com/prods/39148/...al-Floodlights

/Trac-Trac-Pro-SON-70W-Asymmetric-Commercial-Floodlight-Photocell


http://www.screwfix.com/prods/35156/...-Floodlighting

-Light-42W-Black-Photocell-Floodlight

Thanks.

If they've got motion activated halogens allready where's the advantage
in having other

lights that are ON all the time it's dark,is there something wrong
with the MA lamps or

sensors? are they positioned too low down so they can be interfered
with? or is it that

the ON time is too short.
Would they be better off investing in a camera,siren or something else
in addition to the existing lights, or am I missing something here?

Don


Thanks for all the comments.
For wiring reasons, there will probably be only one light, so a 70W Sodium
lamp looks like a good solution.

I'm a little surprised that the police recommend dusk-til-dawn low level
lighting, but I supose the reasoning goes something like this:
- It provides a visible deterrent for any burglars scouting the area,
hopefully they will be discouraged before they ever get within range of the
halogen lights' PIRs.
- It provides reassurance to anyone looking out of a window (or through the
camera, which is also installed), that no-one is sneaking around, having
somehow dodged the PIRs. Because of the layout of the property, it's
difficult to provide 100% reliable PIR coverage without getting lots of
nuisance triggers from cats, foxes, sheep, etc.

70w should be about the right power for that size too


NT