Energy saving lamps or fluorescent lamps are much more efficient than the old bulbs (incandescent bulbs); their mechanism is based on an electrical discharge generated by a potential difference between two electrodes immersed in a gas. They can reach 10,000 hours of operation ensuring a reduction in energy consumption of about 75%.

LED bulbs consume even less, and they operate with the emission of photons from diodes powered by an electronic circuit. Saving compared to traditional halogen lamps can get up to 80-90%, and they can be used for more than 50.000 hours.