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2. Ghost light (theatre) - Wikipedia

   en.wikipedia.org/wiki/Ghost_light_(theatre)

   The practical use of a ghost light is for safety. A ghost light enables one to navigate the theatre to find the lighting control console and to avoid accidents such as falling into the orchestra pit and stepping on or tripping over set pieces. There is an unsubstantiated story of a burglar who tripped on a dark stage, broke his leg and sued the ...

3. Stage lighting instrument - Wikipedia

   en.wikipedia.org/wiki/Stage_lighting_instrument

   Each unit has a characteristic reflector, used in conjunction with the lens (or lack thereof) to create the desired effect. An ellipsoidal reflector has a lamp set at one focus point of an ellipsoid-shaped reflector that bounces the light and focuses it at the second focus point of the ellipse. This focuses the beam of light into a tight beam.

4. LED stage lighting - Wikipedia

   en.wikipedia.org/wiki/LED_stage_lighting

   A front view of a Stagebar LED striplight. LED stage lighting is a stage lighting technology that uses light-emitting diodes (LEDs) as a light source. LED instruments are an alternative to traditional stage lights which use halogen lamp or high-intensity discharge lamps. Like other LED instruments, they have high light output with lower power ...

5. United States lighting energy policy - Wikipedia

   en.wikipedia.org/wiki/United_States_lighting...

   Standard incandescent lamps have an efficacy of 10-17 lumens per watts and a lifetime of 750–2500 hours. Tungsten halogen lamps have an efficacy of 12-22 lumens per watts and a lifetime of 2000–4000 hours. Finally reflector lamps have an efficacy of 12-19 lumens per watts and a lifetime of 2000–3000 hours. [2]

6. Found: Bedroom Chairs That Bring the Coziest and Most ... - AOL

   www.aol.com/found-bedroom-chairs-bring-coziest...

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7. Shaking seats and piped-in fog: How 4DX is carving out a ...

   www.aol.com/news/shaking-seats-piped-fog-4dx...

   In George Miller’s new Mad Max film “Furiosa,” a red paint flare explodes and casts the theater screen in a saturated crimson cloud. Shaking seats and piped-in fog: How 4DX is carving out a ...