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SOLID STATE LIGHTING TESTING
Total luminous flux
is the spatially integrated, photopically weighted, total light
output from a lamp. Total luminous flux is the most important
parameter for non-directional, general lighting products.
For directional lamps, such as reflector lamps,
are the most important parameters.
Solid state lighting is a movement to replace, when environmentally
and commercially viable, general lighting applications with LEDs and
LED-based illuminators. With solid state light the lamp
will be one of the factors for integrating these types of sources
into mainstream general light applications.
The most common method for measuring the total luminous flux
of light sources is using an integrating sphere a spectrometer. The
reading from the detection system is compared to a similar reading
obtained from a calibrated standard lamp of known output, commonly
referred to as the “comparison method”. Today this is commonly done
in software. The results of this comparison determine the light
output LED lighting assembly or LED cluster.
Typical quantities of interest are
color LED based systems luminous flux, luminous efficacy,
chromaticity, color temperature
dominant wavelength, and
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