JIC 7-8 Lb Cross Model Himalayan Salt Lamp From Natural Crystal Salt Slabs Lamp is lovingly hand carved to accentuate the multitude of colors Works as an air purifier by emitting negative ions into the air and light therapy to reduce stress and increase energy . atural Material from Deep more then 2000 Feet below sea level. . Ideally Natural Air Purifier for room 70-100SF, or 2 for a 100-120SF room Use the lamp as a gentle nightlight, or to create a romantic mood. Whether in a child's room, near the television or computer, or in your office, the lamp, sitting on its round wood base, provides a natural touch 7-8LB Cross model Himalayan Salt Lamp , Use dimmer switch to regulate light