LED light bulbs
Modern LED light sources require only one fifth of the power of conventional lighting technology. In addition, they are extremely durable – with a use of three hours a day, high-quality LEDs achieve a service life of about 25 years.
Although LED lamps have become much more affordable, few households still opt for efficient lighting with LEDs. Yet replacing just one 60-watt filament bulb with an LED bulb can save 16 euros per year.