by the radiation in the filament it throw out heat .
this way the bulb demonstrates the heating effect. :D
When electricity passes through the wire of a light bulb, the resistance in the wire causes it to heat up through a process called Joule heating. This heating effect causes the wire to reach such high temperatures that it emits light and produces illumination in the bulb.
Heating effect of electric current.
Heat source.
The scientific name for an electric bulb is incandescent light bulb, named after the process of incandescence which produces light through heating a filament.
The invention of the light bulb affected how energy was used.
A brighter future!
A light bulb, campfire and A Microwave Oven •
The heating of the wire causes light to be emitted.
A pencil has nothing to do with the brightness of a light bulb.
The main effect is the production of light.
Illumination. There are minority uses as well, for example heating a hamster cage.
Light energy (EM visible radiation) plus thermal energy (through heating the bulb filament)