I got these dusk to dawn light bulbs from Torkase. They automatically turn on and off by themselves, and are truely “smart” light technology! During the day, the bulbs stay off saving valuable time and money. When they sense nightfall, they turn themselves on. This is especially handy if your going away for a few days. The light being on can deter would be criminals from breaking into your home! This was my first time owning bulbs like this, and due to them being energy efficient we plan on replacing a majority of bulbs in our home. These also work great for those with jobs that make them come home late, the bulbs are already on so you don’t have to fumble with keys or stumble in the dark. I highly recommend them!