Energy saving light bulbs and LED bulbs last between 6,000 and 15,000 hours , that is, up to 15 times longer than conventional light bulbs. They also use less electricity, up to a fifth of what normal incandescent bulbs use.
This makes a 23-watt energy saving light bulb lasting 6 years cheaper for the consumer than using several conventional 80-watt light bulbs for the same period of time (European Union calculation based on a tariff electricity of 0.136 euros per kilowatt-hour).





