A light meter is a device used to measure the amount of light. In photography, a light meter (more correctly an exposure meter) is used to determine the proper exposure for a photograph. The meter will include either a digital or analog calculator which displays the correct shutter speed and f-number for optimum exposure, given a certain lighting situation and film speed. Similarly, exposure meters are also used in the fields of cinematography and scenic design, in order to determine the optimum light level for a scene.
Light meters are used in the general field of architectural lighting design to verify proper installation and performance of a building lighting system, and in assessing the light levels for growing plants.
![PCE Instruments PCEEM888 [PCE-EM 888] Wind Speed, Temperature, Relative Humidity, Barometric, and Light Meter](image/cache/wp/gj/Products/PCE_%20PCE-EM888-200x200.webp "PCE Instruments PCEEM888 [PCE-EM 888] Wind Speed, Temperature, Relative Humidity, Barometric, and Light Meter")
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![PCE Instruments PCE-EM 886 [PCE-EM 886] Multifunction Light Meter](image/cache/wp/gj/Products/PCE_PCE-EM-886-200x200.webp "PCE Instruments PCE-EM 886 [PCE-EM 886] Multifunction Light Meter")
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