Light meter

A light meter (or illuminometer) is a device used to measure the amount of light. In <a href="/facts/Photography/ezLPT43M">photography</a>, an exposure meter is a light meter coupled to either a <a href="/facts/Digital_data/JChckAvr">digital</a> or analog calculator which displays the correct <a href="/facts/Shutter_speed/5CMJNBop">shutter speed</a> and <a href="/facts/F-number/QcdW0077">f-number</a> for optimum <a href="/facts/Exposure_(photography)/Rzr0aGMd">exposure</a>, given a certain lighting situation and <a href="/facts/Film_speed/HjnLPrIb">film speed</a>. Similarly, exposure meters are also used in the fields of <a href="/facts/Cinematography/Umcgh4GC">cinematography</a> and <a href="/facts/Scenic_design/urbg2QSq">scenic design</a>, in order to determine the optimum light level for a scene.
Light meters also are used in the general field of <a href="/facts/Architectural_lighting_design/NmpKQeMr">architectural lighting design</a> to verify proper installation and performance of a building lighting system, and in assessing the light levels for growing plants.
If a light meter is giving its indications in <a href="/facts/Lux/xa3AAqWd">luxes</a>, it is called a "luxmeter".

Light meter open-in-new

Light meter