I have into the scene this lamp with spotlight https://drive.google.com/file/d/0B3NE_Eh1h5LYVk1qT256YmdlQVU/view?usp=sharing The problem is that if I insert into the scene 20/30 lamps on the older devices the FPS go down from 45 to 20 / 25 fps. The lamp's spotlight is set to Auto and Not shadow...and the culling mask is only over three layers.... There is a method for to increase the performance ?