Before installing this fixture, check to make sure all the bulbs are screwed in tightly (sometimes they loosen during shipping). If they are not screwed in tightly, remove them completely and then screw back in. Note that a little silicone may be holding them in--if you grasp the base of the bulb, you can easily break the seal of the silicone without damaging the bulb. Scale: 1/12 Assembly Required: No 1/12 scale, also referred to as one-inch scale (or 1" scale), means 1 inch = 1 foot