Lighting movement sensors

[allegrif]

This is probably a thing already, but how about having a lighting system hooked up to motion detectors? I can't imagine a motion detector would use much electricity at all, so perhaps there could be a system whereby if a motion detector doesn't detect movement in a room for a minute or so it automatically turns the lights in that room off? This could perhaps be configured to allow a manual override in certain rooms or at certain times.

I think something like this would help me greatly, my memory lets me down too often with turning the lights off!

[LucidEnergy]

I have noticed this become more prevelant in recent years, especially in the hallways of apartment blocks built post-2005. I don't see it much in private residences. I imagine the system can be somewhat of a hassle to setup, which is why it's only really common in new buildings, with older systems not getting converted.

I wonder how much it saves when the new lighting systems themselves are already quite efficient, this would have been much more useful with incandecent lighting systems.

[JamesH]

We used to have them in our school. What I'd really like to know is just how much energy the sensors and related equipment use. I know it can't be that much, but it does make you wonder, especially as it will be active 24/7

[allegrif]

I think the energy used by a movement sensor is infinitesimally small. The savings would far outweigh the energy usage.