The principle of the energy-saving lamps energy-saving lamps is using the principle of gas discharge operation, it and the name of the operation of the ballast fluorescent lamp, in addition to white ( Cold light) Outside, there are yellow, Warm light) . In general, under the same wattage, an energy-saving lamp than incandescent lamp energy saving 80%, life expectancy extension of 8 times, thermal radiation is only 20%. Not strictly, the energy-saving light of a lamp 5 watts light can be considered as equal to 25 watt incandescent lamp, 7 watts of energy-saving lamp is approximately equal to 40 watts of light, 9 watt is equal to about 60 watts. Energy-saving lamps, also called compact fluorescent lamps ( Foreign CFL lamp) It was invented in 1978 by foreign manufacturers first