Aside from all of the other silliness already pointed out, there is no standard lighting about which one could make a generalization. A harsh light for one show may well be the opposite in another. When the show is loaded in, there are no lights already there; it is a blank canvas.
One of the signature magical elements of the park productions is how the lights evolve as the daylight retreats. It's a major feature of the design, and one of the (many) reasons that a fixed start time is essential.
