LED retrofit lamps as replacement of the old incandescent bulbs with E27 socket. LED lamps are immediately bright and the light is convinient. The power consumtion is less than an eights. The life expectancy is many, many years. Furthermore LED lamps include no poisons, like mercury or halogen. The LED consists of silicon, a kind of quartz sand. COB LED have included lenses and are the economical solution for outdoor lighting, store rooms etc. SMD LED have a very high light quality with a good colour rendering for living room, kitchen, office, shop lighting etc.