Lighting is an essential part of any house or workplace. Lighting extends working hours. Even in times past, lanterns, lamps and candles made it possible to work or play longer. Lighting can also be part of setting a mood. Decorative or utilitarian lamps are part of creating ambiance. Decorative lamps frequently use lower wattage bulbs. Utilitarian lamps, which function as work lights, often use higher wattages or more bulbs. Even utility lights can be decoratively designed, adding good appearance to an area. Functional can be as attractive as ornamental. Metal, glass and imitation wood grain are popular lighting choices.