Bring a calm, serene and tranquil feeling to any room with a beautiful salt lamp. Salt lamps should be kept away from moisture and are intended for indoor use only. Each hand carved lamp comes with a cord and wooden base. Warning: For your safety, please use 5 or 7 watt bulbs only. SYMBOL: Salt lamps are known throughout the world for their ability to purify the air. These natural air purifiers work when lit by emitting negative ions into the air that attack positively charged particles.