Definition
Colour temperature is the colour value emitted by a light source, expressed in Kelvins.
Introduction
Different light sources produce different coloured light. These different colours can be expressed using a number, and this number is known as the colour temperature.
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| "What is colour temperature?" Photographymad.com. http://www.photographymad.com/pages/view/what-is-colour-temperature. |
5500 K is the colour temperature of average noon daylight (i.e., midday sun). Colour film is typically balanced to this colour temperature, which means that, when shooting film in optimal conditions, the image will record white objects as white and all of the colours will appear natural.
This video by Phillips Lighting provides a good explanation of colour temperature:
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Related terms
References
"What is colour temperature?" Photographymad.com. http://www.photographymad.com/pages/view/what-is-colour-temperature.
Wikipedia contributors, "Color temperature," Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/w/index.php?title=Color_temperature&oldid=817900849 (accessed January 12, 2018).
http://lowel.tiffen.com/edu/color_temperature_and_rendering_demystified.html