The good old light bulb has its best years behind it. It is being replaced increasingly by energy-efficient lamps and LEDs. Nevertheless, light bulbs are still used in the industrial sector and in older equipment. Fluorescent light bulbs show a more positive energy balance. They are available in different versions and are still very much in demand as, e.g., office lighting. But LED lights offer unbeatable advantages. Their energy efficiency and light output cannot be outdone. This is true of both domestic and commercial use, in public places or vehicles. They can also be used with control and programming devices for colourful indoor and outdoor lights. Illuminants such as communications lamps or glow lamps are specialists in their field and serve certain products such as phones or household appliances.