luxmäärä

Luxmäärä, also known as lux value or illuminance, is a measure of the amount of light falling on a surface. It is defined as the luminous flux per unit area, and is expressed in lux (lx). One lux is equal to one lumen per square meter. Luxmäärä is a crucial parameter in lighting design and photography, as it helps determine the brightness of a scene or object.

The human eye can perceive a wide range of lux values, from the dim light of a moonless night (around 0.001 lx) to the bright sunlight (over 100,000 lx). The International Commission on Illumination (CIE) has established standard lux values for various lighting conditions, such as office lighting (300-500 lx) and road lighting (1-3 lx).

Luxmäärä can be measured using a luxmeter, a device that detects the amount of light falling on a surface and converts it into a numerical value. Luxmeters are commonly used in photography, astronomy, and engineering to ensure proper lighting conditions for various applications.

In summary, luxmäärä is a fundamental concept in the field of lighting and vision science. It provides a quantitative measure of the brightness of a scene or object, and is essential for designing and evaluating lighting systems.