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Continuing the publications that teach about lighting, explaining some more technical terms, comes the turn of the concepts of illuminance.
Also called illumination or illumination intensity, the concept of illuminance refers to the amount of light that illuminates or scatters in a given area. It is a unit that serves to measure light, being represented by lux or lx, as defined by the SI - International System of Units.
In other words, it can also be said that illuminance is the amount of light that exists within a space. In order to be able to quantify illuminance on a surface, it is necessary to make use of a device named colorimeter or an Illuminance meter (luxmeter).
Besides them, the so-called illuminance spectrophotometer can also be used. However, light emitted in a certain environment does not distribute evenly. This means that when measured, the value of illuminance will not be the same at all verified points.