The three basic kits that are sold are 3-way conversion, outlet conversion, and add-a-light. They may be under different titles depending on brand, but essentially the kits do as follows:

3-way – makes a single-switched light/outlet into a 3-way. First, the original switch is replaced with a special switch, which also contains a receiver. Then, the new switch (from kit) is placed wherever you want it. This new switch contains a transmitter that activates the receiver in the special switch mentioned above. You end up with a setup just like a wired 3-way.

Outlet Conversion – basically the same as above, but instead of a special switch, you get a special receptacle containing a receiver, and another transmitter switch. The switch controls the receptacle.

Add-a-light – probably what you will be looking for – a receiver unit is wired in-line between the light fixture and the power, and the supplied transmitter is then mounted as in the above two examples. This is great for rehab work because all you need to do is get your 110 to the light. The remote does the rest.

Advantages – quick, saves the frustration of fishing wire for switches. Transmitter switches look like regular switches, and can use standard decorator wall plates. I just installed ceiling fans in my kid’s rooms, and I used the ceiling fan versions which come with hand-held remotes which control both lights (including dimming control) and fan. Easy as pie.

Possible Disadvantages – more costly (but not bad, maybe $25/unit). Transmitters use batteries that need replacing periodically, depending on use, and some models stick out from wall more than a normal switch. Some cheaper models have limited frequency settings, which means you will be limited to the number of unique switches you can use. Too many, and you will end up duplicating frequencies and more lights may come on than you want. Also, in condo or townhouse situations, you may be turning on your neighbor’s coffeepot if he uses the remotes too.

All in all, I have been pleased with their performance, so I think you should at least look at them. They are usually in the electrical sections of the store.

Good luck.