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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.

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Unit: Lumen (lm)

The luminous flux expresses the total light power emitted by a light source. It is calculated from the spectral radiant power, by evaluating this with the spectral brightness sensitivity of the eye.
The luminous flux Φ is a measure for the amount of light of a light source.
Φ = lumen (lm)

Luminous flux describes the total light power emitted by a light source. As a rule, this radiant power could be expressed as emitted energy in the unit of watts. However, this method is inadequate for describing the optical effect of a light source, since the emitted radiation is recorded without discrimination over the entire frequency range and the different spectral sensitivity of the eye is not considered. The inclusion of the spectral sensitivity of the eye results in the quantity termed lumen. A radiant flux of 1W emitted at the maximum extent of spectral optical sensitivity (photopic, 555 nm) gives a luminous flux of 683 lm. Conversely, the same radiant flux emitted at frequency ranges of lower sensitivity (as per the V λ curve) results in correspondingly smaller luminous fluxes.

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