Light bulbs are the key to artificial lighting.
Light bulbs are the most common lighting in most households and buildings. The process of lighting is done by heating up the metal filament within the glass bulb creating a glow which culminate in lighting a room.
The brightness of a light bulb is determined by the overall luminance emitted by how high the Watt/W.
Various light bulbs will emit light covering different ranges of the light spectrum. Some people prefer lights that more closely mimic the spectrum of natural sunlight.
Types of light bulbs: