S. No

Lamp type

Method of operation

End of life

Advantage/disadvantage

1

Incandescent

Gas filled chamber & burning filament

Burn out no-warning

Excellent colour rendition

Large amount of heat produced

2

Gas discharge

Electrical current passes through gas

Dims over time

More light emitted than incandescent

More expensive

3

LED

Semi-conductor

Dims over time

Do not generate heat

Fine adjustments to light

Small range of light emissions