Indusclassic 6.5 Inch Himalayan Salt Lamp Natural Crystal Rock Ionizer Air Purifier, 2-4 Lbs, 1.5 Kg Heating the salt with bulb releases negative ions into the air, creating an effect similar to an ionizer, purifying the surrounding air Works as an air purifier by emitting negative ions into the air and light therapy to reduce stress and increase energy Unique salt lamp is made from Natural Himalayan salt crystals hand mined in the Himalayan Mountains Pure 100-Percent Natural Himalayan Salt is good for Smoking room. Each Natural Salt Lamp Comes with 15-watt bulb, on/off switch and 6-feet electric cord.