Yes, a light on top of the "roll cage" would be great. Enlarge the picture on this link to see how this guy mounted his:
My.Ventrac - Featured Fan Profile It's just kind of hard (impossible) to justify the roll cage just to mount the light higher. I was originally thinking of
some kind of posts or bracket to get the light mounted high like that. Then, I thought if I would
mount two lights, just a little higher but wider than the factory headlight, maybe I could get good results.