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For the same rating the amount of radiant heat produced in which of the following lamp is the least?

  • For the same rating, the amount of radiant heat produced in a Fluorescent lamp is the least.
  • Fluorescent lamps are much more efficient at converting electrical energy into light energy than filament lamps, sodium vapor lamps, or mercury vapor lamps.
  • In a fluorescent lamp, an electric current passes through a gas that contains mercury vapor, which in turn emits ultraviolet radiation.
  • This ultraviolet radiation is absorbed by a phosphorescent coating on the inside of the lamp, which then emits visible light.