Uplighting various palm trees in yard
If you are looking to light the entire canopy I would think the flood lights with there broader focus would work good. I you want to show light beams in the canopy I think spots would be good. It is sort of hard to predict what lights and exactly how many will give the effect you desire. However you can get a few and temporary place them at night just to see there effect and then you can make your plans of were and how you would like them.