Philips has smart Hue light bulbs that produce flashy colors, but what about bulbs that change just enough to give you a good night's rest? You're set after today. The lighting firm is trotting out Hue white ambiance lights that offer color temperatures which mimic natural light, helping you sleep naturally. Combined with new "routines" in an upcoming version of the Hue app, they can shift gradually to reflect day and night cycles -- a sleep mode can use dimming light to replicate the sunset, for example, while "wake up" brightens the area. There's even a nightlight mode to help kids get back to sleep after wandering the hallway. Logically, the new Hue offering should also be useful for creating different moods. You could have cool, crisp lighting in a workspace, or warmer temperatures in the living room.