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  2. Foot-candle - Wikipedia

    en.wikipedia.org/wiki/Foot-candle

    CGS. 1.076×10−3 phots. A foot-candle (sometimes foot candle; abbreviated fc, lm/ft2, or sometimes ft-c) is a non- SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the ...

  3. Candlepower - Wikipedia

    en.wikipedia.org/wiki/Candlepower

    Candlepower (abbreviated as cp or CP) is a unit of measurement for luminous intensity. It expresses levels of light intensity relative to the light emitted by a candle of specific size and constituents. The historical candlepower is equal to 0.981 candelas. In modern usage, candlepower is sometimes used as a synonym for candla.

  4. Incandescent light bulb - Wikipedia

    en.wikipedia.org/wiki/Incandescent_light_bulb

    Candle-flame bulb: CA35 E12: CA11 E12 ⌀35 mm (~⌀11/8 in) candle-flame shape, ⌀12 mm Edison screw Flood light: BR95 E26: BR30 E26 ⌀95 mm (~⌀30/8 in) flood light, ⌀26 mm Edison screw Halogen track-light bulb: MR50 GU5.3: MR16 GU5.3 ⌀50 mm (~⌀16/8 in) multifaceted reflector, 5.33 mm-spaced 12 V bi-pin connector

  5. Lux - Wikipedia

    en.wikipedia.org/wiki/Lux

    The corresponding unit in English and American traditional units is the foot-candle. One foot candle is about 10.764 lx. One foot candle is about 10.764 lx. Since one foot-candle is the illuminance cast on a surface by a one-candela source one foot away, a lux could be thought of as a "metre-candle", although this term is discouraged because it ...

  6. Illuminance - Wikipedia

    en.wikipedia.org/wiki/Illuminance

    Illuminance. In photometry, illuminance is the total luminous flux incident on a surface, per unit area. [1] It is a measure of how much the incident light illuminates the surface, wavelength-weighted by the luminosity function to correlate with human brightness perception. [2] Similarly, luminous emittance is the luminous flux per unit area ...

  7. Roman candle (firework) - Wikipedia

    en.wikipedia.org/wiki/Roman_candle_(firework)

    A Roman candle is a traditional type of firework that ejects one or more stars or exploding shells. Roman candles come in a variety of sizes, from 6 mm (0.24 in) diameter for consumers, up to 8 cm (3.1 in) diameter in professional fireworks displays. Roman candles are banned in some countries as they have a tendency to malfunction. [1]

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