Daylight Harvesting Technology


  • Recently, Ministry of Science & Technology has decided to promote a unique, possibly India’s first, Start-up in latest Daylight Harvesting Technology.

About Daylight Harvesting Technology

  • Daylight Harvesting Technology aims to reduce carbon footprint and improve the building energy efficiency.
  • Technology Development Board, a statutory body of Department of Science & Technology will promote the Start-up in Daylight Harvesting Technology.

    Daylight Harvesting Technology
    Credit: Loytec
  • The company aims to create Green & Net zero buildings and to participate and contribute in national missions under the National Action Plan on Climate Change (NAPCC).
  • Daylight Harvesting is a method of saving the energy costs associated with lighting. It makes use of the available sunlight.
    • The solar energy spectrum has 45% energy as visible light and this can be used to harvest building illumination for about 9-11 hours a day.
  • It is one of the most advanced techniques used in sustainable lighting designs for contemporary buildings.
  • It automatically dims or adjusts the brightness of light in response to the amount of natural light available in a space.
  • Utilising natural daylight coming through the windows or skylights minimises the amount of energy used in artificial lighting.
  • The daylight harvesting system employs light sensors, also known as photocell sensors, to detect the prevailing light level in the environment.
  • It then sends the intensity of light received to a controller, which is connected to the lighting control system. The control system in turn adjusts the electric lights automatically according to the measured light level.

Source: PIB

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