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Lamp efficiency is expressed in ________.

This question was previously asked in
MPPGCL JE Electrical 28 April 2023 Shift 2 Official Paper
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  1. watts per lumen
  2. lumens per watt
  3. candle per meter squared
  4. watts per candle

Answer (Detailed Solution Below)

Option 2 : lumens per watt
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Detailed Solution

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Lamp Efficiency

It is also known as radiant efficiency. It is defined as the ratio of energy radiated in the form of light, which produces a sensation of vision, to the total energy radiated out by the luminous body.

Lamp efficiency = energy radiated in the form of light / total energy radiated by the body

Lamp efficiency is measured in lumens/watt.

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