A CFL lamp is the progress of candent lamp.
As we know, incandescent lamp is Edison’s important invention.From that moment, it helps us out of darkness and go to a bright future. But the lamp wastes too much power, because nearly less than one tenth of the energy is turned into light, and the other turns into heat. So people ar seeking other ways to use the new light source for replacing incandescent lamps. So energy-saving lamps emerge astatine the right moment, because of its cheap and good production, there is a trend to gradually replace the incandescent lamp.