4 100 watt KC's
 

okay so i had to lights but i just got the other pair. but i wanna if i can include all four lights in one circuit. how are some of you guys running your circuits.

4 is too many. Best to wire them up in pairs. Mine are wired in pairs - the 2 inner ones on it's own switch & relay & the 2 outers on it's own switch & relay. All the lights are powered directly off the battery with a 40 amp fuse.

agreed. if you want you can run 1 switch to both relays but i would make sepurate wire runs, most kits dont have thick enough wire for one thing and putting them together might be to much on the relays. wire in pairs, 40 amp fuse, and make sure its a good ground please.

I have mine all on one relay. I had to get a bigger fuse but other than that it should work.