Staircase timer

A single action turns on the lights and they remain on for long enough to ascend or descend the stairs.

In a single occupancy domestic dwelling it is usual to provide multiple switching locations.

In a multiple occupancy dwelling, the drawback is that the cost of shared lighting is usually paid by the landlord.

A large push-button, distinctly larger than a normal electrical switch, is pressed manually.

As PIR sensors are not perfectly reliable a timer is needed to avoid the lights flashing off and on as the occupier moves out of detector range.

Owing to the variability of occupancy time in a restroom, a simple fixed timer was unworkable.