CU of a single rat in a small cage who is fed a diet that is deficient in vitamin D. WS of a doctor in a lab coat holding a jar with a rat in it. He walks outside to a table and takes the rat out of the jar. He places the rat in a shallow container. He holds the "life Lite" an inch away from the rat for five seconds. The study determines that holding the life lite up to the rat for five seconds over eight days cures the rat of rickets.