Electric candle is also lit up the London and the ancient Persian streets

Electric candle is also lit up the London and the ancient Persian streets, also Roman Theatre and the Royal Palace of Cambodia over the arc lamp shining hh .the advent of electric lighting has opened a new era in human history indicates that lighting of great significance. arc lamp as light has strong, high luminous efficiency , color is good, the printing plate making, film screenings and other fields incomparable advantages, until today still occupy a place. But the electric candle power consumption, short life, but also harmful gases, so the emergence in the incandescent It almost disappeared in the lighting field has.
1879, Edison in practice on the basis of previous research, creating the world's first carbon filament incandescent lamp can be useful. Edison improved carbonization methods used to a length cotton covered with charcoal powder, bent U-shaped, fitted to the clay pot in high-temperature heating filament made of, then sealed to the glass bulb filament inside, and carefully removing the air inside. in the year October 21, the light bulb Start light, continuous light 45 hours! Edison created the incandescent lamp made great contributions to the process. .from the immature to mature .incandescent glory enjoys popular support, has a large number of inventors to join to the incandescent lamp Improved career.