Light is more than just brightness and color temperature. Like the food we eat, light has complex components that affect humans on mood, energy, sleep and hormones. Originally Lighting Science used biological lighting at NASA to allow astronauts to rest and work better in an environment where there were no differences between day and night. The Harvard Medical School study found a particular spectrum affecting the body’s production of melatonin, a hormone that helps people work harder during the day and fall asleep more easily at night. My Lumens teamed up with Lighting Science to launch the Good day / Good night biological spectrum lighting.