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The fluorescent tube of 30 W has the luminous flux of

  • The fluorescent tube of 30 W has a luminous flux of 1800 lumen.
  • Fluorescent tubes are more efficient than incandescent lamps because they produce more light for the same amount of power.
  • The luminous flux of a fluorescent tube is typically given in lumens per watt (lm/W), which is a measure of the amount of light produced per unit of power consumed.