What is the difference between incandescent and fluorescent?
Only a very small part (which may be less than 1%, not calculated) can be converted into useful light energy.
It is called incandescent lamp. Incandescent light, a lot of electricity will be converted into heat,
Like the burning of the red iron can be issued as the light to the light the higher the temperature of the filament, the more light the light emitted.
Spiral filament constantly heat accumulation, making the filament temperature of 2000 degrees Celsius above the filament in an incandescent state
How the incandescent works: Current through the filament (tungsten wire, melting point of more than 3000 degrees Celsius) to produce heat