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Indoor and Built Environment
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Lighting Quality Surveys in Office Premises

T.M. Chung

Department of Building Services Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

John Burnett

Department of Building Services Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

The lighting quality in an indoor space affects the prod uctivity, comfort, well-being and health of the occupants. In this article a lighting quality index called the CSP index is briefly reviewed and two office lighting quality surveys are described. Data from a large scale lighting quality survey show a very poor correlation between the CSP index and the occupants' subjective assessment of the lighting quality. Surveys before and after a lighting retro fit project that consisted of two stages are also reported. Results show that the occupants preferred the higher light levels after the retrofit. However, the data also show that a higher percentage of occupants reported that they suffered from headache or eyestrain after the retrofit. Therefore, it is not clear whether the lighting quality overall was improved by the retrofit.

Key Words: Lighting quality • Survey • lighting • Retrofit • lighting

Indoor and Built Environment, Vol. 9, No. 6, 335-341 (2000)
DOI: 10.1177/1420326X0000900605
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