Occupancy Sensors and No Light Switches

["Winspear, James" <james.winspear@xxxxxxx>]

Hi,
Having convinced my future wife of the use of a few simple PIRs triggering
very dark hallway and stair lights a copious amount of alcohol a few nights
ago has given me the task of using no light switches what-so-ever, if
possible !  Help, how do I go about this ?

We live in an old cottage, with very low ceilings which is fairly dark
anyway, and currently no plaster ! (or lights/electrics for that matter)

I'd envisage a setup such as :
- Secret Switches for manual override, where deemed necessary

- Pronto-IR-HomeVision-X10 control of all lighting circuits

- Single PIR/Ultrasound/Occupancy sensors in each area (primed around
doorways etc) feeding both the alarm system and also HV

- East and West facing external light-level detectors (we don't really have
any windows on North/South anyway).

- Some nifty HV programming, per zone, so that we could setup :-
~ Zone indication that always turned the lights on
~ Zone indication that turned the lights on if the East/West facing
light-level dipped below certain level
~ Variable length of no-indication before the lights turned off (so that
the
stairs would turn-off after 20 seconds of no-indication, but that the
living-room(couch-potato room) would only turn-off after 15 minutes of
inactivity - possibly deferred until no TV AC current is sensed).

Has anyone also gone to this level of automation ?  It all seems a
reasonable aspiration, but I'm unsure of the practicality of it all.
Does anyone have any Occupancy Sensor recommendations ?  As we're trying
to minimise the visual intrusion I want to avoid the larger wall mounted
varieties, and want the smaller ceiling mounted types.

James

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