These are authentic natural colour Himalayan Salt Lamps and each piece is unique in colour, design and size. Salt lamps are known to help reduce smells from animals, chemicals, mould, allergens such as pollen or dust and airborne bacteria. Salt lamps are effective in the home or workplace, with great benefit having one near your computer. Each lamp comes with a lead to plug into a power source and a low watt heat bulb. These salt lamps attract the moisture improving, drying and naturally ionizing the air. Research states salt lamps produce negatively charged ions which water molecules in the air attract to and evaporate warming the surface. If you have experienced the fresh air at a waterfall or mountain top then you have experienced the results of negative ions. The air smells fresher and is much easier to breathe.