so ask any j**p guys who actually use their j**p off road, or off road racers/pros, and they will all tell you that there are better places for lights, and infact, this is one of the worse spots for lights. reason being the light is so close to you eye(in a close parallel proximity) that the reflections and or glare created can in some cases make vision worse... examples of when this might happen include, dusty conditions -dirt roads, forest service roads, trails ect. foggy conditions. rain or snow. and even clear hwy driving(given you are useing them responsibly and not having them on while oncoming vehicles or other vehicles in general are on the road in the same area as you) as they can light up the road and hwy signs(typically they are coated with a highly reflective coating to increase visibility) and they will bounce the light back at you blinding you.
i have experiances this with my lights ontop of my ARB bumper at night, on the hwy. there is a reason why auto manufactures place their fog lights as low and as far out from the driver as possible. its to reduce possible glare -this is also the main reason that projector lamps were invented and implemented into automobiles. think of it like a camera, the farther away the flash is from the lens the less "red-eye" you will have in your picture, this is why most professional photographers either use remote flashes(often times on stands else where) or will bounce light of something else like say a wall or a ceiling or reflector ect to get the light onto the subject.
most j**p owners i know who have lights there never use them other than for driving lights during the day off road because they are basically useless 70% of the time.
dont get me wrong i think the CBI mount with a dually looks sweet, but thats about it imo