GFCI ONLY - For use on GFCI and GFI outlets (Test and Reset) only. This is not for use on Light Switches or standard outlets. Featuring a new LED light bar, the GFCI GuideLight will look great on your backsplash and in the bathroom. EASY INSTALL - Because of the patented prong design, the GuideLight simply snaps on, no batteries, wires, brackets or mounts required. It was designed for a truly simple and safe solution to the household nightlight. FREES UP OUTLETS - You can finally have the curler and hair dryer, toaster and blender, and lamp and tablet plugged in at the same time. The GuideLight frees up sockets through its built in LED lights. DUSK TO DAWN - The built-in light sensor can tell when the area is dark, triggering the LED lights to activate. Whether you are in a dark room throughout the day or you need a subtle light at night, The GuideLight has you and your outlet covered. LONGER PRONGS - As explained in the product video, some GFCI outlets have screws more recessed than normal. Reach out to customer support so we can send you a modified product. The LED lighting of the GuideLight is enhanced with a softly diffused light bar. IPatented prongs mean it is even easier to install and works better with different outlets. The GuideLight brings beautiful pathway, bathroom, bedroom, backsplash, nursery and garage lighting to your home. The GuideLight is safe and reliable. Forget about stubbing your toes in the middle of the night, the monsters under the bed, and waking the house up when you get up in the night. The light sensor on the face of the plate ensures that your GuideLight will look like a regular cover-plate during the day, and light up for lighting when it is dark at night. Different from a traditional night light, the GuideLight has built in LED lights so the cover does not protrude from the wall, heat up or break. On top of all of that, the GuideLight only costs about 10 cents per year to power. Simply stated, in seconds your house can be safe, lighted and more like home. Please Note: Duplex and Decor styles DO NOT work on GFCI outlets (with the Test and Reset buttons).