@trinsec had that experience once also
@barefootstache I only forgot to turn off one light when I left for work. But that's alright, heh. Hard to check whether your lights are still on or off during a power outage. :D
@trinsec unless you know how the position of the switches should be
@barefootstache Of this particular one it's impossible. It's a 'hotelschakeling'. Means there are 2 switches for one light. Those switches could be in either position.
@trinsec well yes, though only a certain amount of permutation will make the light be on or off
@barefootstache Not sure I understand you. Two switches for one lamp means either one can be in either or both or whatever position for being on or being off. It cannot be predicted. One switch is upstairs, other's downstairs (for the stairwell).