This unit is for a decent number of lights exceeding the normal wattage/amperage of household light switches. I put a couple of these in my garage to control about 20 lights. I really like how these work. I can turn on 12 high powered, high lumen lights with just one switch, not 4 like I would otherwise have to. This type of system is not for everyone. Make sure to do your reading and know what you are getting in to before committing to this type of system. There are extra wires and considerations to remember while you are doing this.