(invented by Thomas Alva Adison)
Employs the principle of converting electrical energy into heat
at aa temperature that causes the filament to be incandescent
(red or white hot).
Incandescent Light
(invented by Audre
Claude, also the inventor of neon lamp)
Contains mercury vapor, an electric arc is
produced between the opposing
electrodes generating some visible light.
Fluorescent Light
Produces high intensity light within an arc tube contained in an
outer bulb. The metallic gas within the arc tube may be
mercury, sodium or a combination of other metallic vapors.
High- Intensity Discharge (HD) Lamp