#Daylight + lighting
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02.daylight+<strong>lighting</strong><br />
1(23)<br />
introduction<br />
There are three major functions of day<strong>lighting</strong> systems for<br />
buildings:<br />
• to provide solar shading<br />
• to provide protection from glare; and<br />
• to redirect daylight.<br />
Day<strong>lighting</strong> and the impact of day<strong>lighting</strong> on the heating<br />
and cooling of buildings has a direct relationship to<br />
energy use and associated carbon emissions. Good<br />
day<strong>lighting</strong> design requires a balance between<br />
competing elements in façade and electric <strong>lighting</strong><br />
systems; to find the optimum between a day<strong>lighting</strong><br />
system and the control of heat input and unwanted<br />
glare.<br />
Day<strong>lighting</strong> systems serving multiple functions with a mix<br />
of strategies (e.g. the redirection of direct sunlight<br />
and the use of controlled shading devices), may be<br />
much more economical than using photovoltaic<br />
electricity.
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