The lights are just there to fill the gaps. I have two lights up on the rack toggled for reverse lights. I will be hooking up brake lights today. And for the license plate its up on the roof rack too. I used two ford superduty license plate lights and modified them to fit in the rack also to light up the plate.
As for the dimensions, If you look in Asthetics forum I posted in there I was going to take my companies model for the Wrangler and cut and weld to fit our trucks....Next is a BullNose Heavdy Duty Front :355: