Here's some details on my mounting solution for the lights.
I needed a temporary solution until I have the custom cabinetry built at which point the Radions will get mounted inside the hood. But that will be a while, so for now I was looking for a solution where I didn't need to hang each light individually, and I wanted to be able to slide the lights side to side incase there was need for adjustment. This setup was thrown together fairly quickly so it's not the prettiest, but it works. Consider it a beta unit that could be made to look prettier. But what I ended up with will influence what I do inside the hood when I get to that point.
Basically, it's just two 9' sections of hollow square aluminum bar from Lowes that I cut down to 7' and cut a channel down the center with a table saw.
Sprayed them with some primer and then a quick coat of black.
Got some longer bolts that thread into the radion mounting screws and some washers. This is what holds the radions in the aluminum bar, and they can slide back and forth.
Then I realized I needed to tie the two bars together for support so they didn't twist so I got some 12" x 1/4" threaded rods from Home Depot and some matching washers and nuts and drilled holes through the sides. One rod on each end.
The wires used to hang from the ceiling are typical Sunlight Supply hanging kit hardware, or what Ecotech sells as their hanging kit. I think this was the same hardware I had from my beta units.
I just sent the other end of the wire through the ceiling sheetrock and secured it in the attic.
The radions just slide in from each end and can slide back and forth for infinite side to side adjustment.