As you probably already know, caffeine, especially when taken at the right time, boosts alertness and can improve your focus. New research suggests, however, that you could get even better brain benefits and more energy from being exposed to blue light.
Photo by Serge Saint.
Swedish researchers tested a group of 21 volunteers' psychomotor and cognitive functions under four different conditions: exposed to white light and taking 240mg of caffeine, blue light and 240mg of caffeine, white light and a placebo, and blue light and a placebo.
They found that both the caffeine-only group (under white light) and the blue light-only group (no caffeine) had better accuracy on a visual reaction test that required making a decision -- and they also performed faster than the other two groups. Their overall psychomotor function was better than the other groups as well.
The blue light-only group, however, did even better than the caffeine group on staying focused and being accurate when faced with different distractions. They also had substantially better visual reaction.
So those blue lightbulbs not only look cool, they may help you work better too.