Well it's off of an early 2002 but just to give you an idea here's what I did to mine.

Front


Back


Don't know how big of lights you want to go, mine are 3.5" lights. They have seen lots of low branches and offroad abuse and are still holding up great. They have been on for the last 3.5 years. Hope this gives you an idea anyway...
If you are really worried about the weight of bigger light directly on the plastic you can pick up a piece of 1.5" flat stock (the lenght of the wind deflector) and use it as a brace in the back for strenght.