Filament: The piece inside the bulb that produces light when heated by an electrical current.
Electricity: A form of energy resulting from charged particles such as electrons or protons, typically produced by chemical reactions like those in batteries or magnetic force fields.
Fluorescent Lamp: A type of lighting device that uses electricity to excite mercury vapor in argon or neon gas producing short-wave ultraviolet light which then causes phosphor coating on the inside of the lamp to glow.