Abstract
Daylight availability in Hong Kong is described based on routinely measured hourly global horizontal solar radiation data and studies of luminous efficacy in Hong Kong. Frequency analysis of these derived exterior illuminance data gives the potential energy savings from daylight-linked on-off or top-up controls. An example of lighting energy savings is given based on a typical office building configuration. Effects of obstruction on the possible lighting energy savings are analysed for on-off and top-up controls. Current building regulations for the ‘rights of light’ are discussed along with existing problems in designing for daylighting buildings in Hong Kong.
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