Incandescent Light Bulbs and Voltage

What does an incandescent light bulb produce?

Light by heating a filament inside the bulb with an electric current

What does the voltage supplied to the bulb determine?

The amount of electric current flowing through the filament

What is the rated voltage of a bulb?

The voltage at which it is designed to operate optimally

What happens when the voltage supplied to an incandescent bulb which is less than its rated voltage?

The electric current flowing through the filament is reduced

What does a reduced voltage result in?

The filament producing less heat and light, causing the bulb to burn dimmer

Since the filament is not heated to it’s maximum temperature:

It experiences less wear and tear, leading to a longer lifespan for the bulb