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BEAM P
LUS
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NTERIORS
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OMMERCIAL
, R
ETAIL
A
ND
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NSTITUTIONAL
I
NDOOR
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NVIRONMENTAL
Q
UALITY
(IEQ)
IEQ 9 N
ATURAL
L
IGHTING
Copyright © BEAM Society Limited. All rights reserved. Page 116
B
ACKGROUND
Access to daylight is an important aspect of comfort and health.
Critical to providing sufficient daylight is the provision of a view of the
sky. The amount of daylight available for specific rooms is related to:
i.
window and room geometry and room surface finishes;
ii.
sky obstruction due to the form of the building and its
overshadowing from neighbouring buildings;
iii.
glazing transmittance;
In Hong Kong’s congested built form rooms on lower floors of
buildings may be considerably overshadowed by adjacent structures.
This can significantly reduce natural light, incur electricity
consumption for artificial lighting, and degrade internal comfort and
health conditions. It is possible to take into account the
overshadowing by adjacent buildings using appropriate design tools.