TENEMENT HACKS: STAIR LIGHTING TIMESWITCHES
If you live in a tenement, you may well have been frustrated by power cuts affecting the time the stair lights come on and go off.
The reason power cuts affect lighting timing is because the timing on each stair is controlled by an ‘Astro clock’, or timeswitch, which turns the lights on and off at the right time of day for the time of year.