I tried mounting 6" offroad lights to the fixed panels between the hood, doors and windsheild pillars and the hood hit them when I would try to open it.
I have also taken 4" round stick-on style lights and simply stuck them to the top of the windsheild. Once I made shades for the bottom of them to deflect the light away from the dash, they worked pretty well.
Now I just use a single pair of Bosch Profi210 driving lights with 130 watt bulbs. They give more than enough light for wheeling on even the darkest of nights:
I had also tried making a light bar above the windsheild:
It would swing forward, allowing the roof to open and close. Overall it wasn't very durable, though and took damage the first time I had it in the woods. Plus the lights shook a lot.