On. Off. All by itself. Automatically switched light is convenient and saves energy in home entrances, drives, hallways, staircases and rooms that are used only briefly.

Automatic light/dark indicator systems have very common utilities in day-to-day life. Such applications include street lighting at night, morning alarm, automatic emergency light and dark activated ...

[Dillon] wrote in to tell us about his latest project, an automatic light switch for a the hallway closet in his house. Although this project could probably be done very simply, [Dillon] accomplished ...