These lamps are also known as Vitamins in Air. A small bulb fitted inside at the bottom of the lamp helps in evaporation of such productive ions in air. The Salt Lamps release a negative ion charge in polluted environment. This reduces the effects of harmful positive ions generated by excessive use of electronics producing electro magnetism. It plays a vital role in improvement of breathing. It catalyses breathing and enhances efficiency of lungs. Also beneficial for throat infection, asthma and allergy. We have categorized these lamps into following categories :-