Himalayan Salt Crystal Lamp (Large: 16-20lb) by Solay Many studies have shown that salt crystal lamps can increase the negative ion count. Negative ions benefit asthma patients, people with chronic lung illnesses, and allergy sufferers. As well, they help improve learning, memory, and emotional well being. By creating a balance of ions in the air, they stimulate natural drive and healthy energy. A low-cost method, a Solay Salt Lamp is an excellent source of negative ions and is strikingly beautiful, blending favorably with any environment. Each Solay lamp comes with an attached zen wood base, UL tested dimmer cord, allowing you to adjust your ambiance, a 15 watt bulb and care instructions. Weight: 16-20 lbs Height: up to 12” Ion Radius: Approx 12’