标准光源

定义

A

Artificial illuminant such as a tungsten lamp at a color
temperature of 2880°K

B

Noon sunlight at 4874° K

C

Average daylight (overcast sky) at 6774° K

D50

Typical bright daylight (overcast sky) at 5000° K

D55

Typical bright daylight (overcast sky) at 5500° K

D65

Typical bright daylight (overcast sky) at 6500° K

D75

Typical bright daylight (overcast sky) at 7500° K

F2

Cool white fluorescent lamp at 4200° K