Abstract: A light suitable to be mounted upon the wall of a building or a room thereof wherein the light contains an apparatus comprising a weighted object which will be displaced at the existence of an earthquake of a given, preset magnitude and upon being displaced will close a circuit activating an emergency light in such manner that occupants in the area may see the light and be guided by it. The light is battery activated and may be of the type which is continually charged by normal household current and may include a low drain test light to indicate battery condition.