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Nobody had input on if you can achieve a wide beam pattern while using one of the diesel bumpers???
I want to order one ASAP
You can achieve a wide beam pattern regardless of where you mount them, it comes down to the lamp it self. The design of the reflector/refractor and lens geometry are what determines the beam pattern. The better lamps are rated by degree's, and not so much a generalized beam pattern such as fog or flood or driving etc. So if you'd like to mount them in a diesel bumper, simply research a lamp that has the beam pattern you would like.
You aren't going to find a lamp with a wider beam pattern then 180*, and you most likely won't find one that is actually 180* wide; 150-160* is more realistic. Check out Hella, or PIAA, both have great offerings and will give you a much better technical description then your run of the mill parts house lights.