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  2. Solar simulator - Wikipedia

    en.wikipedia.org/wiki/Solar_simulator

    A solar simulator (also artificial sun or sunlight simulator) is a device that provides illumination approximating natural sunlight. The purpose of the solar simulator is to provide a controllable indoor test facility under laboratory conditions.

  3. Lumen method - Wikipedia

    en.wikipedia.org/wiki/Lumen_method

    In lighting design, the lumen method, (also called zonal cavity method), is a simplified method to calculate the light level in a room. The method is a series of calculations that uses horizontal illuminance criteria to establish a uniform luminaire layout in a space.

  4. Standard illuminant - Wikipedia

    en.wikipedia.org/wiki/Standard_illuminant

    D65 simulator, daylight simulator F8 0.34588: 0.35875 0.34902: 0.35939 5000 D50 simulator, Sylvania F40 Design 50 F9 0.37417: 0.37281 0.37829: 0.37045 4150 cool white deluxe fluorescent F10 0.34609: 0.35986 0.35090: 0.35444 5000 Philips TL85, Ultralume 50 F11 0.38052: 0.37713 0.38541: 0.37123 4000 Philips TL84, Ultralume 40 F12 0.43695: 0.40441 ...

  5. List of free electronics circuit simulators - Wikipedia

    en.wikipedia.org/wiki/List_of_free_electronics...

    List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE.The following table is split into two groups based on whether it has a graphical visual interface or not.

  6. Lux - Wikipedia

    en.wikipedia.org/wiki/Lux

    The lux (symbol: lx) is the unit of illuminance, or luminous flux per unit area, in the International System of Units (SI). [1] [2] It is equal to one lumen per square metre.In photometry, this is used as a measure of the irradiance, as perceived by the spectrally unequally responding human eye, of light that hits or passes through a surface.

  7. Luminous flux - Wikipedia

    en.wikipedia.org/wiki/Luminous_flux

    Luminous flux (in lumens) is a measure of the total amount of light a lamp puts out. The luminous intensity (in candelas) is a measure of how bright the beam in a particular direction is. If a lamp has a 1 lumen bulb and the optics of the lamp are set up to focus the light evenly into a 1 steradian beam, then the beam would have a luminous ...

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  9. Lumen (unit) - Wikipedia

    en.wikipedia.org/wiki/Lumen_(unit)

    The lumen (symbol: lm) is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units (SI). Luminous flux differs from power ( radiant flux ), which encompasses all electromagnetic waves emitted, including non-visible ones such as thermal radiation ( infrared ).

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