An incandescent light bulb converts electricity into light by sending electricity through a filament.
Standard filaments are made of tungsten.
An incandescent light bulb converts electricity into light by using tungsten.
What does an incandescent light bulb use to convert electricity into light 

[1] energy
[2] light
[3] heat energy
[4] Tungsten
[5] heat
[6] Neon gas
[7] Coal
[8] Helium