When light stimulus was weaker and concentrated on central vision, there was no significant difference between a red light and a green light in the aspect of dark adaptation.

光刺激作用主要集中在视网膜中央窝的条件下，等亮度较弱的红光与绿光之间暗适应时间无显著差异。

youdao

Market participants are waiting to see if he will conduct another stimulus program in light of slowing economic growth.

FORBES: Gold Prices Could Rally Next Week If Dollar Gains Fizzle

Going forward, we believe that growth in the Chinese auto market will remain bumpy until the government renews its stimulus program in light of worrying global economic environment after reigning in inflation.

FORBES: GM Earnings Next Week Could Drive Stock To $27

Researchers said that result doesn't rule out the possibility that short-wavelength light also could be an alerting stimulus in the afternoon.

WSJ: Skin Cancer, Driving and Men