I wanted some switches with 'pilot' lights to visually indicate when they are ON. They will be inside my new backyard workshop, but control the exterior lights. Functionally, these are essentially the opposite of lighted interior light switches that glow when the lights are OFF. The red glow is a good reminder that you, or another convenient perpetrator, left the outside lights on (AGAIN!). (A fingerprint kit may,or MAY NOT, be a good idea to indict the forgetful culprit). It would be nice if homes were routinely built with pilot light switches for all exterior lights. Porch lights, patio lights, Christmas lights, etc., I've (well, someone) sometimes left driveway and porch lights on for days at a time. These switches work fine, but there was no wiring diagram on, or in, the packages. [Knocked off one star in my rating]. Not being an electrician, I had to do some Internet searching to find out how to properly wire the the four different colored screws. Perhaps I can explain in words, what the wiring diagram I found showed. Brass Screw: That is for the Line IN (Hot Wire - usually black). Green Screw: The ground wire. So far this is exactly the same as most wall switches. Black Screw: This is the Hot (black) Wire Out to the light fixture. Silver Screw: Here, you need a wire "nut" for the Neutral (white) wiring. In the wire nut, connect the Neutral wire coming into the light switch box, the white wire going out to the light fixture, and a short (6") white 'jumper' wire to the silver screw on the switch. I know that's hard to follow. Hopefully, you can find the little wiring diagram, which I think I found on the Leviton site. It didn't show the screw colors on the diagram, but I figured that out. I then printed small copies of the diagram, wrote in the screw colors, and taped them to the boxes so that I'd remember when I installed them. The switches are wider than many others. The body is 1-5/16 inches wide, and the screws will make that about 1-1/2". Putting two of these into a double gang box is a bit tight. You have to be extra careful about not stripping too much insulation from your wires. The switches are relatively shallow, the body being only 15/16" deep. As with many light switches, there are no 'push-in' spring connections on the back. Note: These are wired quite differently than the glowing interior switches which are lighted when the room lights are OFF. Those usually only have have three screw connectors - Brass, Brass, and Green. Those generally don't have a connection for the Neutral (white) wire. They are wired exactly the same as normal light switches - Brass, Brass, and Green. Black (Hot) wire IN, Black (Hot) wire out, and Ground. Ground wires in all of these cases are also connected with a wire nut (usually green). The Ground wire nut connects the bare ground wire OUT to the light, the bare ground wire coming into the electrical "box", and a 6" bare jumper wire connected to the green screw on the switch. If you want to replace your unlighted porch light interior switch with one of these pilot lights, you'll need to check how the existing switch is wired. What did the original builder do with the white (Neutral) wire? This may be a bit beyond the "pay grade" of the average D-I-Y homeowner. Depending on how old your house is, there may not even be a white (Neutral) wire at the switch box. Older than that, and there may not even be a ground wire.