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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 USA/Canada 120V/60Hz, 277V/50Hz-60Hz.

What is photometry?

Photometer: device for photometric measurement.

Photometry refers to all photometric measuring procedures in the wavelength of "visible light". These are converted by means of a photometer. Originally, photometry was a sub-area of physics. Today it is an engineering science.

Lighting technology uses a number of quantities to quantitatively represent the properties of light sources or their lighting effects. Quantities such as

are used. These quantities describe visible light in terms of the physiological perception of brightness of the human eye. This distinguishes photometry from radiometry, which evaluates electromagnetic radiation only according to its physical power or energy.

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