Question

Why are incandescent light bulbs considered to be lower efficiency than LED bulbs?(1 point)
Responses

A greater amount of energy is required for the same light output from the LED bulb.
A greater amount of energy is required for the same light output from the LED bulb.

A greater percentage of the energy output of the incandescent bulb goes toward heat.
A greater percentage of the energy output of the incandescent bulb goes toward heat.

A smaller percentage of the energy output of the LED bulb goes toward light.
A smaller percentage of the energy output of the LED bulb goes toward light.

A smaller amount of energy is wasted by the incandescent bulb.
A smaller amount of energy is wasted by the incandescent bulb.

Answer 1

A greater percentage of the energy output of the incandescent bulb goes toward heat.

Incandescents produce light by heating a filament, so most input energy becomes heat rather than visible light. LEDs convert a larger fraction of electricity into visible light, so they are more efficient.