Recently purchased a new washer and dryer that are stacked in hall closet. When the old items were removed I noticed I have light fixture that I never seenb before. I took off plastic cover and noticed a two prong light. This light has not worked in the 7 years i lived in my unit. There is no apparent light switch for this light . I did purchase a new replacement bulb with no luck. My naive assumption is this light is supposed work in the closet door is opened. I am more curious on how it works than having a light. I have a attached a picture . I would appreciate any help on this . thanks