The 2-Pack of Deluxe Dusk to Dawn Light Sockets have improved sensors over older models for better sensitivity, allowing them to work in many more areas of your home. They can even be used outside under covered fixtures. These light sockets have also been upgraded to work with almost any lightbulb up to 150 Watts. Many other models only can handle up to 60W or 100W. Plus they're as easy to use as screwing in a lightbulb! Everything is automatic with no buttons, switches, or complicated directions to follow. Simply screw the light socket sensor into your lamp, screw in the lightbulb and you're done. As long as the lamp is turned to the on position, it will turn on at dusk and off at dawn. With these DELUXE models, the improved light sensors allow lamps to turn on in low light conditions but also stay on until a threshold of natural light is reached. This means you can have your room bright with artificial lighting without tripping the sensor. The light will only turn off when natural lighting or extremely bright artificial lighting reaches the sensor. If needed, you can always override the sensor and turn the light off manually. These work great to ensure the lights are on any time you come home at night. They're a MUST-HAVE when you're on vacation because there is no better theft deterrent than leaving the lights on! Don't settle for less, these are high-quality, UL-listed light sensor sockets that will last for years to come.