Himalayan Rock Salt Lamps are great funtional decore. The bottom is drilled out to fit a light bulb with a cord and then glued to a wooden base. Not only are these a neat piece and make a great night light glow, they clean your air! The air in the room has been likened to the feeling of being in the Amazing Rain Forest with it's crisp clean feeling. When warmed the salt sends out negative ions, the ions grab onto particles in the air, like dander, hair, dust and smoke, making them heavy and drop to the floor where you later can just vacuum it up. They don't get hot, just warm. Tips for purchasing a lamp get the pinkest/orangest one you can, it has more iron in it and send out more negative ions to filter your air. They come in many shapes and sizes.