Intelligent Light Switching - Thoughts?

["P G" <psghome@xxxxxxx>]

In my new Comfort/HomeVision/PC setup I want to be able to intelligently
switch lights on/off and dim depending on movement/occupancy, time of day
and light level (I don't want much then!).

I'm planning to possibly use the LD11U DIN Dimmer modules for every ceiling
and wall light in the house and every room will have the smallest, most
unobtrusive PIR.

My thoughts are that I'd be able to automatically switch a rooms light on
via movement sensed by the PIR. This would only happen if the ambient light
is below a certain level. Other conditions could also come into play e.g.
if
it's the middle of the night, the lamp may only come on at a lower dim
level
etc.

Has anyone done this? What's your setup and how have you done it?

As to the light sensor part:
1)  would I need just one mounted outside
2)  or one in each room (allowing more local sensing)
3)  is a simple switching type set at a predefined level OK or can you get
a
variable (analogue or digital) sensor that may be a bit more flexible in
the
programming side? i.e. would report a variable light level - could be tied
to the dim level of the lamp?

Am I being too ambitious? I expect the programming to be a bit of a
headache.

Thanks,

Paul.


_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx