明视觉对光的敏感度比暗视觉低。

Photopic vision is less sensitive to light than scotopic vision.

随着光线水平的增加，人眼从暗视觉切换到明视觉。

The human eye switches from scotopic to photopic vision as light levels increase.

进而提出不同色光在明视觉光度学 、 介视觉光度学 、 暗视觉光度学和日变光度学的光效率.

And then indicate that different spectrum in photopic photometry, mesopic photometry, scotopic photometry and circadian photometry.