I would try giving the dormant plant a fairly warm spot and a light watering until you see growth, then worry about light. Mine that was dying off started to push leaves when I moved it from the cool area to the high (hot, we pull this air for home heating) and dry. I keep the room humid, so it was enough for the plant to restart. I didn't even realize until Rachel and Tropic straightened me out on it. When I got it down, it was growing. At DG, LariAnn has articles about jewel type alocasias.... I think a search like jewel alocasia should pull them up.
