Smart lightbulbs can be programmed to turn off and on based on your schedule, so you won't have to even think about accidentally leaving a light on all night. Crazy schedule? You can also automate them based on other events in your home, like arming your alarm or setting off a motion detector in a hallway.
Know what all this automation leads to? A smaller electricity bill. Your lights are only on when you need them, and they can even adjust based on weather conditions so they'll know to dim on sunny days. Don't you wish saving money was always this easy?