1.4.4 Reduce the number of lamps

1.4.4 Reduce the number of lamps


The measure proposes to remove from each fixture a certain number of lamps depending on the light levels previously measured with a light meter. Lamps will be removed where light levels are higher than the acceptable working levels.


  • The reduced number of lamps reduces also the energy consumption

  • Improve visual comfort

  • Less maintenance will be required


  • De-lamping may require some minimal wiring changes or the installation of phantom tubes

  • A preliminary daylight study may be necessary

Economic assessment

Initial investment: low. The cost is zero if the measure is self-made installed. Other costs may appear if wiring should be changed or if a maintenance company is contracted.

References and best practices

Image gallery


Environment or playable world:

  • Residential

  • Academic

  • Offices

  • All

Carried out by:

  • Public building users

  • Owners

  • Operators

  • All

Reduce consumption of:

  • Heating

  • Cooling

  • DHW

  • Lighting

  • Electric devices

Type of driver:

  • Physical environmental

  • Contextual

  • Psychological

  • Physiological

  • Social

Time framework:

  • Short term
  • Long term

Type of measure:

  • Envelope
  • HVAC
  • DHW
  • Lighting
  • Electrical devices
  • Other
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