Wiring for multiple lights on roof rack. Common ground wire?

Planning to mount 3x 12" light bars on the 2 sides and rear of my roof rack and undecided if I want to rack/body mount a front light bar.

I just wanted to run my thoughts on how to wire these. Plan to run wires up the side of the snorkel, dediciated positive/negative for the front light bar. But I was thinking I could run 3x positives (individually switched) and 1x common ground for the rest of the light bars? The ground would run around the perimeter of the rack and I can just tap in when I need?

As long as the common ground cable was heavy enough to handle the current of all the lights being on together it should be fine. The other option is to make sure the roof rack has a decent ground to the rest of the truck and just locally earth each light to the rack

i got a led light bar on the Ural truck.