Low voltage halogen lamps are used for displays or accents, which is why you frequently come across them in museums, art galleries, retail stores, and the home. The sharp defined beam make these lamps ideal for highlighting anything from sculptures to shoe displays. They also make great floor or desk reading lights!
Low voltage desk lamps are very common in home offices because they provide a bright beam of light without using a lot of power. These would be perfect for dorm rooms, but many schools outlaw them because they tend to get very hot.