I added socket & bulbs on my CRV but did not purchase a kit. I went to the local Napa dealer and bought two sockets with bulbs. I used extra wire & connectors I had from a previous trailer wiring project. Not hard to do but does take a bit of time. The power to the lights is completely isloated from the tow car.
Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 1995 Wrangler