Looks good to me! You might have basically the same thing I have Jim. Mine come with connector cords to join them and also a cord with a plug and rocker switch. I have (16) of these in my 2.5 garage. I have mine set up 2 lights per switch. I'm just cheap I guess but I only light the area I'm working in. That leads me to this; I tend to use the 2 lights over my mill/lathe area the most. What I do is every few months, I swap those fixtures with 2 from another area so they all get some use. With these, they just snap in place with 2 metal clips and they are light as a feather so it's real easy to swap them around.
Having light colored walls helps reflect the light. The K is for Kelvins which will dictate the color. I think there are something like 4000k, 4500k, 5000k and higher. Not sure which way it goes but one end of the scael is a bluish white, then pure white and then they get more yellowish. The same thing as fluorescent, they too had this rating.
When I replaced my fluorescent lights, it was a huge change in color! At first I thought, uh oh, maybe I made a mistake but within a few minutes you start to realize that the brighter whtie light is so much better for a garage/work area! I could see things in much more detail. Within no time, you won't even remember the change. I'd leave the yellowish ones for more house use/ rec room situation.
If you go back to page 3 of this post, I posted pics of mine where I compare the old with the new. Just one of these single lights were brighter than a double 4' fixture and just about the same as my old double 8' fluorescents. Just lighting 1 of those 8' fixtures used 220w! One of these I tested with a meter was 25w. (package says 24w but oh well...)
Another bonus with these is if you have the habit of turning lights off when leave an area or lots of on/off use like I do, LED's don't mind that a bit! It will not affect their life.