Building Owner PCCW-HKT Telephone Limited
Installation of occupancy/motion sensor for on/off/dimming control of lighting
Replacement of high efficacy lighting source
Building/Project Name East Exchange Tower
Systems Electrical System - Lighting
Building Types Commercial - Office
Others - Carpark    
Description of the building:
  • A 24-storey building with offices, exchanges and a carpark.
  • The 2-storey carpark located in basement equipped with 16 parking space.


Retrofitted initiative:
  • Replaced the original T8 lighting with LED tubes that integrated with a microwave motion sensor at B1, B2 & LG floor.
  • The LED lamp operates at full power when the sensor sensed motion.
  • The LED lamp within escape route would be dimmed to 30% automatically when the sensor sensed no motion along access path after 1 minute. The minimum lux level will be maintained at 30 lux for meeting the requirement of Mean of Escape.
  • Other LED lamps would be switched off automatically when the sensor sensed no motion within carpark space after 1 minute.



Observed benefits other than energy saving:
  • Prolong the lifetime of the LED tube, therefore save money.
  • Reduce the temperature of carpark, therefore better indoor environment for carpark user.



General observations of the retrofitting project:
  • New carpark lighting system retrofit have not affected the users.
  • Standard retrofitting initiatives with proven technologies and straight forward.
  • Retrofit requires shut down of lighting system temporarily at a very short period of time. Minimal disturbance to tenants.
  • Overall a well justified project with good outcomes with tangible and non-tangible benefits.


Other information:





  • East Exchange Tower Basement 1 Plan
    (Lighting lux measurement)
    Unit: Lux
  • East Exchange Tower Basement 2 Plan
    (Lighting lux measurement)
    Unit: Lux

Cost Saving
Total cost: HKD 45,000 Total savings/year: 24,800 kWh
Payback: 1.8 years


Installation of occupancy/motion sensor for on/off/dimming control of lighting
Replacement of high efficacy lighting source
Building Owner PCCW-HKT Telephone Limited
Building/Project Name East Exchange Tower
Systems Electrical System - Lighting
Building Types Commercial - Office
Others - Carpark    
Description of the building:

  • A 24-storey building with offices, exchanges and a carpark.
  • The 2-storey carpark located in basement equipped with 16 parking space.
Retrofitted initiative:

  • Replaced the original T8 lighting with LED tubes that integrated with a microwave motion sensor at B1, B2 & LG floor.
  • The LED lamp operates at full power when the sensor sensed motion.
  • The LED lamp within escape route would be dimmed to 30% automatically when the sensor sensed no motion along access path after 1 minute. The minimum lux level will be maintained at 30 lux for meeting the requirement of Mean of Escape.
  • Other LED lamps would be switched off automatically when the sensor sensed no motion within carpark space after 1 minute.


Observed benefits other than energy saving:

  • Prolong the lifetime of the LED tube, therefore save money.
  • Reduce the temperature of carpark, therefore better indoor environment for carpark user.


General observations of the retrofitting project:

  • New carpark lighting system retrofit have not affected the users.
  • Standard retrofitting initiatives with proven technologies and straight forward.
  • Retrofit requires shut down of lighting system temporarily at a very short period of time. Minimal disturbance to tenants.
  • Overall a well justified project with good outcomes with tangible and non-tangible benefits.

Other information:






  • East Exchange Tower Basement 1 Plan
    (Lighting lux measurement)
    Unit: Lux
  • East Exchange Tower Basement 2 Plan
    (Lighting lux measurement)
    Unit: Lux

Cost Saving
Total cost: HKD 45,000 Total savings/year: 24,800 kWh
Payback: 1.8 years


Installation of occupancy/motion sensor for on/off/dimming control of lighting
Replacement of high efficacy lighting source

   


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