Standard for USA/Canada: 120V/60Hz, 277V/60Hz
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The colour of the light emitted by a lamp. The colour of light can be expressed by using xy coordinates to specify a colour locus in the chromaticity diagram. White light colours can also be expressed as a colour temperature, and can also be broadly categorised as either warm white (ww), neutral white (nw) and daylight white (dw). The same colours of light can have different spectral distributions and a correspondingly different colour rendition.