I took a look at the digital light switch devices, but they weren't going to work for my light switch, which are two switches, as pictured. Also I don't have a regular electrician and didn't want to deal with having to find one, and paying someone for installation (I'm not good with electrical). The Auto Chron actually does install in a minute, like it claims. It works well, and it's a great idea if you want something you can easily install yourself. It basically has a device that moves your light switch manually, which you can also override. Just be sure to start with the light switch down, at the off position.