Photometry of LED Lighting Devices. Tony Bergen. Contents. Introduction – Specific Issues with LEDs IES LM-79-08 Current CIE Activities. Introduction – Specific Issues with LEDs* * And solid-state lighting devices in general. What’s good?. Long lifetime Robust “Tuneable” colours
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Eg: Divergent LEDs on a linear luminaire
Consider a 1200 mm luminaire
measured at 6 metres (5 : 1)
Spatially averaged colour temperature = 5870K
Spatially averaged coordinates: u’ = 0.2051, v’ = 0.4716