A switch, usually mounted on a wall in a building, used to turn the light on or off.

a diamond-shaped pane of glass designed to be set in leads

(Britain) a small triangular side window in a motor car

(astronomy) A soft glow of white light seen in the sky along the ecliptic in an elongated triangular form with its base being on the horizon, particularly in the tropics.

a surface that uses electroluminescence to produce light

(astronomy) a graph of the intensity of radiation from an astronomical object as it changes with time

Alternative spelling of light year

Alternative spelling of lightheadedness

A thin sheet of colored plastic used to affect color temperature of lights when shooting film or video. They are held in front of a light by clipping it to the barn doors using C-47s.

Fast on one's feet, not plodding; nimble, agile.