In the second phase of the day (afternoon/evening), overall light exposure should be reduced, particularly overhead light, and blue light exposure should also be decreased.

“Now, in this second phase of the day, since most of us are working indoors, but even if you're working outdoors, you want to try and get the amount of light reduced overall, but in particular, that overhead light, and you also want to start reducing the amount of blue light that you're being exposed to.”