LED Light Bar
I would not do it.
I had a car with a bar like that coming at me one night last week on a dark two lane road.
I thought I was having an alien encounter or something, so freaking bright I was not able to keep my eyes on the road until he passed by, I had to completely turn my head away from the oncoming lights.
Nothing like taking a couple hundred super bright leds and pointing them in the face of oncoming traffic. LED's are extremely bright with your looking straight at them, and to me it looks like a good way to cause accidents. No need to blind everyone else on the road, just cause someone thinks it "looks cool".
If your old mope needs better lights there are other ways to go about it.