WBM 1316 Himalayan Ionic Salt Crystal Wooden Basket Lamp Chunks are made of Natural Salt Crystal from the Himalayan Mountains Basket is made of neem wood Works as an air purifier by emitting negative ions into the air and light therapy to reduce stress and increase energy Comes with 25-Watt Bulb, dimmer on/off switch, and 6ft electric cord UL-listed (complete lamp)