Lighting parameters
Added 2.12.2021 10:11.49
There are many lighting parameters. But let's take a look at the ones that affect the effect of light on our eyes. These are the so-called photometric quantities.
Lighting has many parameters and their complete presentation would not be worth an article, but rather a book. Or at least an e-book. We have already covered the colour of light, chromaticity temperature and angle of light sufficiently. Today we will focus only on the parameters that affect the effect of light on our eyes. These are the so-called photometric quantities. Let us briefly introduce them.
The most important lighting parameters
Luminous flux
Probably the most important criterion when choosing lighting is its luminous flux. This indicates the total amount of light energy emitted by the light source. In layman's terms: it expresses how bright the light will be. Its value is given in lumens. And the simple equation applies - the higher the luminous flux, the more intense the illumination.
Luminance
Luminance shows the distribution of light flux from one light source in different directions. It therefore indicates the amount of light emitted at a particular angle. Its unit is the candela (cd). And why this name? The reason is simple.
The intensity of illumination
Illuminance represents the amount of light flux that falls per unit area. It is given in lux and is very easy to find out. Just divide the luminous flux by the area in square metres.
To give you an idea: the standard indoor light intensity ranges from 150-2000 lx, during summer you can measure more than 70,000 lx outdoors, and the full moon has an intensity of about 0.5 lx. Wondering what the recommended lighting intensity is for each room? Take a look.
Brightness
Brightness (luminosity) is the only photometric quantity that we perceive with our eyes and our visual organ reacts directly to it. It expresses the amount of light that passes through, is reflected from space or is emitted - and falls at a certain angle. It is expressed in candelas per square metre and therefore represents the luminance of a particular light source with an area of one square metre.
Correlation of photometric parameters of light
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