Sorta, though I don't think normal office hours matter much here. Blue-spectrum light influences the circadian rhythm in your body by shifting it forward, keepi

Sorta, though I don't think normal office hours matter much here. Blue-spectrum light influences the circadian rhythm in your body by shifting it forward, keeping you more awake. Red-spectrum light doesn't influence that rhythm as much and from personal experience, will get you sleepy relatively quickly if it's late at night or you're otherwise exhausted. On the other hand, blue light keeps you awake however once you eat into the normal sleep time of your day enough, you'll start experiencing heavy eye strain, headaches and sore muscles rather quickly. (Personal experience is an Arduino-controlled LED strip with RGBW setting, which allows me to very precisely control the white temperature)