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13May

Do LEDs Lighting Fixtures Change Colour Over Time?

Do LEDs Lighting Fixtures Change Colour Over Time? Most light sources will degrade over time and the LED is no exception. The electrical and thermal stresses on the components will have an effect on the colour performance eventually. Color shift is a mode of early LED failure occurs. Color shift involves a significant change in the spectral output of a light source, resulting in a change in the color temperature and colour rendering properties. Color shift can occur temporarily due to operating conditions or permanently as a result of...

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08May

SDCM & MacAdam Ellipse and Why Are They Important for LED Lighting Fixtures?

SDCM & MacAdam Ellipse and Why Are They Important for LED Lighting Fixtures? In 1931 the CIE published its famous Chromaticity graph. It meant that every color that could be created by a mixture of red-green-blue could be given a unique number on the graph. Around 1940, David MacAdam ran a series of tests and demonstrated that rather than a single color is indicated by a point on a graph, it could be represented by an ellipse surrounding that point. Within...

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