A chandelier is a branched decorative ceiling-mounted light fixture with two or more arms bearing lights. Chandeliers are often ornate, containing dozens of lamps and complex arrays of glass or crystal prisms to illuminate a room with refracted light. Chandeliers are most often mounted over dinning tables, in halls and foyers, in formal living rooms or sometimes in bedrooms. Chandeliers come in a huge variety of sizes and vary in materials from metal to glass and plastic to mica. Popular styles include contemporary, traditional, baroque, mission, artisan, craftsman and tiffany. Other common types of ceiling fixtures include recessed lights, flush mounts, semi-flush mounts, pendants, mini-pendants, hall lights, foyer lighting, chandeliers, mini-chandeliers, island lights, billiard lights, pot racks, track lighting, and rail lights.