remote light switch

I have LED string lighting around the perimeter of my pool enclosure that I would like to control with a standard wall switch (rocker style or similar). The lights are fairly bright, so i'd like the ability to dim them. The lights are currently plugged into a GFCI outlet away from the house...

My house is old. Every room in the house that has a ceiling fan doesn't have a light switch for the fan. To turn it on you use the pull chains. I'm in the middle of remodeling a room and I don't want to put up another fan. As I said it's an old house so it's all plaster walls. I don't want...