Kelvins: a CFL's color is indicated by the Kelvin (k) temperature (listed on the package).
译者注：色温是表示光源光色的尺度，单位为K开尔文。色温是在摄影、录象、出版等领域具有重要应用。
2
In the Kelvin scale, which has no negative figures, the symbol for degrees is not used after the number. So the freezing point of water is 273k, not 273 ~ K.
在开尔文温标中，没有负的温度，数字后面没有表示度的圆圈符号，如水的冰点是273k，而不是273。
3
K is the symbol used for the kelvin units of temperature.