White light is also important in its own right, as today there is plenty of science to show how various shades of white—

with variations in color temperature—impact our psychological state. Cool light that’s closer to blue has an energizing

effect, and is best in the morning. Warm light is relaxing, and is best after the sun goes down. Note, however, that not

every white smart LED light is color-temperature-

tunable. Check out the specs before you buy.