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Technical environment
Technical environment
Global standard 220V-240V/50Hz-60Hz
Standard for USA/Canada 120V/60Hz, 277V/60Hz
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Our contents are shown to you in English. Product data is displayed for a technical region using 220V-240V/50Hz-60Hz.

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Point illuminances

In contrast to the average illuminance, the point illuminance expresses the illuminance at a defined point in space.

 Point illuminances

The illuminance distribution at certain points in the room can be calculated using the inverse square law. This is based on the fact that the illuminance reduces with the square of the distance from the light source. Indirect lighting components are not included in this calculation. Point illuminances can be calculated for a single luminaire or several luminaires. For confined areas with individual luminaires, manual calculations can be appropriate. Where there are a number of luminaires and functional areas in a room, designers use lighting design programs that then include the indirect lighting components. The programs can determine the illuminance for all room surfaces and working planes. The results are displayed in graphic representations of Isolux charts or false colour diagrams.

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Further topics on photometry

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