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  2. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    In the 1970s, Thorn Lighting introduced an energy-saving 8 ft retrofit tube in Europe. Designed to run on the existing 125 W (240 V) series ballast but with a different gas fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction. [ 7 ]

  3. High-mast lighting - Wikipedia

    en.wikipedia.org/wiki/High-mast_lighting

    The pole that the lighting is mounted on is generally at least 30 m (98 ft) tall (under this height it is referred to as conventional lighting system), [1] while the lighting consists of a luminaire ring surrounding the pole with one or several independent lighting fixtures mounted around it. Most units have four, six or eight lights in the ...

  4. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    Dropped ceiling featuring ceiling tiles, lights, air diffusers, smoke detector, and more Dropped ceiling with ceiling tile light fixture. A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. It may also be referred to as a drop ceiling, T-bar ceiling, false ceiling, suspended ceiling, grid ceiling, drop in ceiling ...

  5. Commercial Light Company - Wikipedia

    en.wikipedia.org/wiki/Commercial_Light_Company

    Commercial Light Company is an Illinois electrical contractor and engineering company, which has performed the electrical work for many Chicago buildings. [ 1 ] [ 2 ] [ 3 ] It is located at 245 Fenel Lane, Hillside, Illinois , and is one of the village's largest employers.

  6. Lighting control system - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_system

    The major advantage of a lighting control system over stand-alone lighting controls or conventional manual switching is the ability to control individual lights or groups of lights from a single user interface device. This ability to control multiple light sources from a user device allows complex lighting scenes to be created.

  7. List of tallest lighthouses - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_lighthouses

    This is a list of the tallest lighthouses, by tower height (as opposed to focal height, i.e. height of the lamp of a lighthouse from water level).The list includes only "traditional lighthouses", as defined by The Lighthouse Directory, i.e. buildings built by navigation safety authorities primarily as an aid to navigation. [1]

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