Resource Brochure

42 Casting light on light Lux, lumen and Kelvin; warm, cool and neutral white: al- though the terminology of lighting technology is all around us, it is not always transparent. We’d like to bring light into the dark with a few explanations. Light colour and colour temperature White light consists of the entire colour spectrum; that is to say, it is the sum of all light colours. If the proportion of red in the light dominates the light appears warm, and cooler if it contains more blue. This colour impression that a light source gives us is called the light colour. Colour temperature is measured in Kelvin (K). This only pro- vides information on the visual colour impression; it does not says anything about the thermal value of the light Classes Extra warm white 2700 - 2800 K Lighting of pastry products, for example Warm white 2700 – 3300 K Cosy, calming Neutral white 4000 – 4500 K Sober Cool white 5000 – 6500 K Like daylight, technical, stimulating Multiwhite 5000 – 6500 K adjustable white Cosy to like daylight Colour names are not standardised and do not refer to any specifc light colour, only to colour ranges. Lighting basics Extra warm white Warm white Neutral white Cool white WW lx XW lx NW lx CW lx MW lx