Managing quality lighting in modern workplace

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Managing quality lighting in modern workplace

 

Author: Sin, K. F. Paul
Title: Managing quality lighting in modern workplace
Degree: M.Sc.
Year: 2001
Subject: Hong Kong Polytechnic University -- Dissertations
Lighting
Facility management
Department: Dept. of Building Services Engineering
Multi-disciplinary Studies
Pages: vii, 120, [62] leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1604120
URI: http://theses.lib.polyu.edu.hk/handle/200/2988
Abstract: Facility Management (FM) covers a wide range of disciplines, trades, work and responsibilities .In dealing with office workplace, FM will involve in the design and construction. More specifically the space planning and the maintaining of quality working environment for people will be appropriate. The conditions of a quality workplace include good management in lighting, ventilation, indoor temperature, noise level, fire precaution, electrical and communication cables, chemicals, legionnaires' disease, other systems (lift, waste, video display unit) and operation & maintenance. Hence a quality workplace not only can provide healthy, safety and comfortable environment to the workers, but also enhance the productivity of both employers and employees and thus the profitable growth of the organization. Poor lighting system affects the health of office workers to cause symptoms like eyestrain, migraine and headaches as well as to link to Sick Building Syndrome (SBS). Therefore a lighting system of good quality is necessitated for a quality workplace. In parallel, as energy efficient requirement is a prime factor in the operation of building services engineering system, quality lighting system shall also be energy efficient. To investigate human response and energy efficient status in respect to lighting performance, tests have been conducted in both the quantitative and qualitative approaches. About the quantitative approach, workplaces in two office rooms and one open plan office (totally 3 respondents) have been selected for measuring the energy performance of existing and retrofitted new luminaires with new fluorescent tubes. Besides, illuminance for both existing and retrofitted luminaires were also measured. At the same time, surveys were conducted for these three respondents by asking them to complete the questionnaires for both existing and retrofitted cases. Results showed an energy saving of about 30% in comparing the performance between the existing and the new luminaries. As to the three respondents, they expressed that they did not feel eyestrain or asleep any more under the retrofitted lighting system and they were all satisfactory since they could select brighter or darker condition by just touching the controller. For qualitative approach, 244 respondents were interviewed and asked to answer the same questionnaires used for the above three respondents, about their response to the existing lighting system. Results showed that different individuals have different visual requirements but there was a common phenomenon that the mostly acceptable lighting level (illuminance) appeared to be at about 400 lux which differed from 500 lux for office lighting as recommended by Chartered Institution of Building Services Engineers(CIBSE). Most of the respondents wanted the lighting system at their workplaces to be independently dimmable to enable them to adjust individually the illuminance (lighting level) to satisfy each one's special need. By using independent occupancy sensor, lamps can be automatically switched on or off when end user arrives or leaves her/his workplace and illuminance can be adjusted to suitable level as required. Hence by the dimming control and the automatic switching on/off functions on the lighting system, both the lighting quality and energy efficient performance can be managed.

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