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Hemant uses Incandescent electric bulbs in his rooms. Despite using other electrical equipment in lesser amount, his electricity bill goes higher than his budget. Which of the following is best option he should choose to reduce his monthly power consumption?
1. He should keep using the bulb as there is no energy efficient alternative.
2. He should use fluorescent tubelights.
3. He should use compact fluorescent lamps.
4. He should use LED Bulbs.

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Correct Answer - Option 4 : He should use LED Bulbs.

  • Incandescent electric bulbs consume very high energy. 
  • Also, most of the energy is wasted in form of heat energy. 
  • fluorescent tube lights and compact fluorescent lamps are better options than such bulbs which are energy efficient. 
  • LED (Light-emitting diode) is even more efficient. 
  • LED bulbs consume less electricity as compared to incandescent bulbs or fluorescent tubes or CFLs. 

So, the correct option is 'He should use LED Bulbs.'


  • LED is known as "Light Emitting Diode".
  • A light-emitting diode (LED) is a two-lead semiconductor light source.
  • It is a p–n junction diode, which emits light when activated.
  • When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.
  • This effect is called electroluminescence, and the color of the light corresponds to the energy of the photon.


  • A fluorescent lamp is a low-pressure mercury-vapor gas-discharge lamp.
  • Electrons that are bound to mercury atoms are excited to states where they will radiate ultraviolet light as they return to a lower energy level.
  • This emitted ultraviolet light is converted into visible light as it strikes the fluorescent coating on the bulb (phosphor coating).

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