While traveling throughout Europe we saw these Natural Crystal Salt Lamps in Galleries, Gift Stores, Spas, Doctor's Offices and people's homes, wherever we went. We asked people why they owned them and were told many stories of the use of Natural Salt Lamps for their curative powers. From relieving Asthma and Allergies, to increasing energy and strength, from reducing airborne pollen and dander, to promoting relaxation and reducing stress, we were told many success stories and heard enthusiastic testimonials. Whether or not all the claims of Negative Ion Generation for Cleaner Fresher Air and health benefits are accurate we can't say for sure...you'll have to decide for yourself. What we know to be true is that they are beautiful and add a touch of Nature to your indoor surroundings. Each Large Salt Lamp comes complete with a 6' Cord, EZ-Change Light Assembly? and replaceable bulb. (6-8 lbs)