標準光源 定義
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
    深圳市天友利標準光源有限公司主營產品：標準光源對色燈箱、英國-美國標準光源箱、金屬檢測機、汽車檢測光源、愛色麗X-Rite色差儀、、印刷行業(yè)用標準光源、電腦測色儀、分光密度儀、望遠鏡、色卡、分辨率卡、色溫照度計等光學儀器。