Light is an electromagnetic radiation determined by the light flux, its density and the frequency spectrum. It travels through the environment in the form of waves that have their own wavelength. Most common are ultraviolent, visible and infrared light. Illumination can be defined as the total incident luminous flux per unit area. We know and measure vertical, horizontal and cylindrical illumination. With the help of light meters, we determine the suitability of lights for individual tasks. Depending on their quality, we separate them into several quality classes.
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