light sensors

I have to spend an insane amount of time in the lab over the next week, and this is my first solid block of time. One thing that is peculiar about this room is the motion sensitive lights. If there isn't alot of movement for a certain length of time, they turn off. Off, off, not half the bulbs or dimmed, but off. So I have to sit here and wave my arms over my head in the direction of the door whenever they decide to black out. Its pretty amusing.