Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30262
Title: Office lighting retrofit using dimmable electronic ballasts and occupancy controls
Authors: Chung, TM
Wu, MKT
Burnett, J
Keywords: Dimming control
Electronic ballast
Lighting retrofit
Occupancy sensor
Issue Date: 2001
Publisher: Hong Kong Institution of Engineers
Source: HKIE transactions, 2001, v. 8, no. 3, p. 8-15 How to cite?
Journal: HKIE transactions 
Abstract: To demonstrate the potential for improved performance from office lighting through retrofit of electronic ballasts and digital controls several floors of a high-rise Government building built in the 1980s were selected for a demonstration project. The retrofit project, funded by the US-AEP, was carried out in two stages. The first stage was a straightforward retrofit on two half-floors of non-dimmable electronic ballasts, replacement lamps, but retaining the basic luminaire. The second stage was a retrofit on one whole floor using dimmable 'digital' electronic ballasts linked to an integrated sensor incorporating constant illuminance, occupancy detection and hand-held remote control. The luminaire itself was modified and T8 lamps installed. Meters were installed for the continuous monitoring of electricity use in the retrofitted floor and a 'control' floor. The meters measured the energy consumption, power factor, and harmonics content for the lighting circuits. Measurements of the lighting level were made before and after the retrofits. Occupants' opinion surveys were also carried out using questionnaires before and after the retrofit. This paper discusses the measured energy savings, a comparison of power quality and occupants' opinions of the retrofits.
URI: http://hdl.handle.net/10397/30262
ISSN: 1023-697X
EISSN: 2326-3733
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