In order to properly predict the performance of an LED lighting system and to compare results to competing conventional lighting systems, designers must be particularly careful to use appropriate factors in addition to properly using the two different photometric data formats. With LED lighting systems, the photometric test method ("absolute photometry") differs from conventional source lighting ("relative photometry"). Good practice in illuminating engineering dictates that the designer uses photometric data that is adjusted to meet the conditions of the intended application by accounting for temperature, dirt, and variations of components. « Back to Homepage Lighting Calculations in the LED Eraīy James R Benya, PE, FIES, FIALD, Cree LED Lightingįor decades, lighting calculations have been the backbone of lighting designs for almost all lighting applications, indoors and out.
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