2.2 What Is 'Not-So-Good' Daylighting?
Daylighting should provide illumination without blinding or cooking the occupants.
It must be controlled to keep from being a source of glare. It must be sized so
as to provide sufficient illumination while keeping unnecessary heat gain to a minimum.
Eye adaptation must be considered. An occupant looking at a bright patch of daylight
(direct or reflected) will need time to see at lower light levels.
Daylighting must be coordinated with the electric lighting using lighting controls.
A great daylighting design will not help the energy bill if the electric lights
are on when they are not needed. A recently constructed national airport had great
daylighting elements as part of its design but the daylight controls were 'valued-engineered'
out and so the lights burn all day eliminating any energy savings.
Overhead glazing provides daylighting Source: Benya Lighting Design