Dimmers also help conserve energy and save money on your utility bills. And they're incredibly easy to install. Lamp-base dimmers, for example, screw directly into a lamp's socket. Plug-in foot-control floor lamp dimmers plug directly into the wall and contain a socket that lets you simply plug your lamp into the dimming device. In-line cord-control dimmers can be attached to a lamp cord and require just a few basic tools to install. Here's how to attach this type of device. [ . . . ]