Jamieat

I use marine switches (plenty of 3 ways, illuminated and non to choose from), which are water proof and can typically be found in the marine section of any of the big box stores.

You can get a 3 way for an aerator, that has multi functions. I used one that has an "auto" and "manual" mode. The auto mode has a timer you can set to stay on for a certain period of time and the manual mode stay on till you cut it off. It can also be used as a typical 3 way.

My bass boat was the first LED install I did over 13 years ago. So, several of the first installs I did were all waterproof connections and switches.

Still work, no issues, 13 years later.

Jamieat

There is also a multi function Navigation light switch that allows for various wiring possibilities.

Jamieat

I used all marine switches to wire up the LED's on my mower.

She's putting out 13,000 Lumens!! You can see if you missed a blade of grass 100' away!!

I've always used automotive speaker wire to do the installs. You can purchase a 100' roll in the automotive section at Wal-mart for about 12 bucks. Just be sure to get it from automotive, not electrical. The wire in electrical is not as thick, costs more, and will not withstand being outdoors. The wire is thicker than comes attached to the LED's from the factory. Never had a single issue using it and is a cheap alternative to other wire options.
I've also used trailer light wire in the past. It works well also and is cheap.

g8rfan

I used a standard electrician's tape and ran mine from the battery (with an inline 10a fuse), through the frame and into the passenger side tail light. I then wired that up to a rocker switch and put it in one of the existing holes behind the tail light (not the bed extender holes). I'll see if I can find my original post.

M0RRIS

I tapped into the 7-pin's hot. To be able to turn on the lights without having the key in the ignition I jumped the relay. I just have to remember that it's jumped if I ever hook up a trailer.