These are KC 517's.
They mounted to the provided locations on the Baja rack nicely. I spaced them out with a couple of washers so I could point them downward enough and tapered one of the washers so I could point them outward a bit.
They are wired to come on whenever the stock backup lights come on (the green wire in the middle BTW):
I also got the # 6303 add on switch which I mounted here:
That not only made running the wiring easier but it's easily accessible from the outside of the vehicle while facing rearward with the window open. It's wired so it'll turn them on even with the vehicle off.
So if I'm in the mountains shooting until dark or any other activity which needs cleanup behind the vehicle at the end of the day, I can just reach in and switch them on.
I haven't gotten any good pics of the light they throw yet, I'll try in the future. They have noticeable hotspots in the middle which project a long way back where you can see through your back window, but they also give off a fairly bright ambient light nearly 180 degrees in every direction so they light up the ground and to the sides of the vehicle pretty well.