I think you are going to get very different answers on this one, but here's mine.
Rear lights:
set one up top is pointed about 25ft behind the truck. If you were in a semi truck riding my ass, you would get blinded.
set two is on my bed rack and points almost straight down to flood the light around the bumpers. If you were in a car riding my ass, you would be blinded.
FRONT LIGHTS:
Two sets on lower grill pannel are pencil beams and are pointed out past the H2 low beams and spread out to the corners of the truck so the road is lit up in both lanes and the starting of the ditchs. The two in the middle point straigt in front.
Two sets up on the GOBI rack are pointed out past my brights quite a bit. If you were on a back road somwhere and flipped them on the, two outside ones point in the ditches and that's their only job. The two middles point in each lane and flood the light out very evenly.
So with all the lights on, I can view the ditches in front of the truck up close and out very far also. The road is like daytime even at hwy speeds.
For backing up I can see what behind my rear wheels and also what I am backing towards too.
I have 4 PIAA 1500XT clear driving lights up top in the front of the GOBI rack with the upgraded exteme white bulbs and 4 PIAA P-1000XT in the lower grill. On the rear I have all 1500XT clears with the standard bulbs. Keep in mind if you put a clear non- beveled lense on the back you may not be legal.