We have been working with a game the past 1½ year and have during that time discovered that our stationary light sources are much more expensive to use than movable lights.
Is this because we have too many objects casting shadows, close to the stationary lights? As we understand, the stationary lights produces two shadow types for each object - is this why its expensive? Or is it the size of the baked lighting maps?
for example we have 10 stationary light sources (not overlapping more than allowed) in one of our levels. If we make these movable, we gain around 25 FPS and +10ms. very strange.