I am looking to getting a N Fab light bar but I am not sure what brand of Lights to put on them. I am looking to put 4 lights on it probably 7"-9" lights.

Also is it hard to wire up? I know I am going to have to find a place to put the Switch as well...

 

I cant help with the first part, but the second part you can find out with some math. First off you need to find what kind of wattage you'll be pulling. Most off-road lights are 55W H3 axial bulbs, so at 12v thats ~4.6 amperes. Times four lights, thats ~18.3 amperes. Given an 80% load for a fuse, you could use a 20A fuse, but if you find that blowing often I'd jump to 25A. You can supply all four off a single 30A Bosch relay wired up like so:



If you find the higher wattage off-road lights with the 100W H3 or H1, thats going to be ~8.3A each or about ~33.3A all together. So you would need a single 40A Bosch relay with a 40A fuse. To be safe, if you went with the 100W lamps, I'd tie two to a single switch using the method above instead of all four taxing a single system, to prevent voltage drop loss and luminous intensity output drop (see below):

 

Thanks for the help