1.This Himalayan Salt Lamp are individually handcrafted. 2.Negative Ions and Natural Air Purification. Himalayan salt crystals is the source of these negative ions. The negative ions are released into the air and neutralize the positive ions in the surrounding. As they are attached to the positive ions, it will help make the air becomes fresh and pure. 3.By placing a lamp or two in the rooms where you spend the most time can make a very big difference in allergy symptoms. 4.Put the rock salt lamp on your bed stand, put the dimmer to the lowest setting and you have an amazing light night that will help with your sleep. The negative ions will help reduce anxiety and also with making the atmosphere more relaxed with the warm soft glow. 5.Himalayan Salt Lamps are hygroscopic. Water can evaporate from the heat of the light bulb. This is called "sweating" and happens in more humid climates. We recommend to put a plate underneath the lamp to prevent water damage on furniture.