Foul Light: An electronic indicator/light, often combined with a buzzer noise, that is triggered when a beam of light that transverses the foul line is broken.

 

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Foul Light: An electronic indicator/light, often combined with a buzzer noise, that is triggered when a beam of light that transverses the foul line is broken.

Lightfast: A pigments resistance to fading on long exposure to sunlight. Watercolors are rated lightfast on a scale of I-IV. I and II ratings are the most permanent.

Lightfastness: No loss of color due to exposure to light, heat or weathering.

Lighting: The placement, type, direction, and brightness or dimness of lights used on stage. Often lighting can establish mood, highlight specific characters, actions, or scenes, or serve symbolic purposes.

Lighter-Than-Air Craft (LTAC): Generally referring to powered blimps and dirigibles, but often also includes free balloons.

Lightbox: Box of fluorescent tubes balanced for white light and covered with translucent glass or plastic. Used for viewing, registering or correcting film negatives and positives.

Light-Emitting Diode (LED): Abbreviation of light emitting diode, an electronic device that lights up when electricity is passed through it. LEDs are usually red. They are good for displaying images because they can be . . . View Full Definition

Light-Tight: Term denoting a material or piece of equipment that is impervious to light.

Lighting Color: Light may be 'colored' by placing a filter or gelatin in front of a light source.

Lighten Up: Selling some part of a stock or bond position in a portfolio to realize capital gains or to losses or increase cash assets.