We managed to get hold of some kind of remote that's supposed to disable the sensor for two hours (though it's difficult to actually test, since there's no feedback at all when pressing it).
Since we're already using a Raspberry Pi for other purposes, I have the project of decoding the remote's protocol and driving an infrared led from one of the RPI's GPIO ports.
At Mozilla's mountain view office, the lights automatically turn off at night. To keep them on, you have to call a phone number and punch in what floor you are on. But of course this was annoying because you weren't always near a phone or aware of the number, so there is an intranet website that uses some VoIP service to phone the building controller to keep the lights on.
Since we're already using a Raspberry Pi for other purposes, I have the project of decoding the remote's protocol and driving an infrared led from one of the RPI's GPIO ports.