Chapter 2 Lighting Environments

Daylight Integration and Control Advantages of daylight and windows: –Psychological & biological well-being –Constant and standard light –Passive solar energy penetration in the winter –Ventilation with non-fixed windows –View of the outdoors –Reduction in electrical lights –Enhances visual acuity 2

Daylight Integration and Control Disadvantages of direct light and windows: –Fading and deterioration of fabrics and artwork –Cracking and peeling of woods and paints –Glare –Increased heat in the summer –Black holes at night 3

Site Orientation Southern exposure: –Various intensities and colors –Can fade and deteriorate materials Northern exposure: –Even intensity and spectographic characteristics East/West exposure: –Low, variable sun angles = glare 4

Sunlight vs. Daylight

Sunlit sky vs. day-lit sky

Sunlight penetration changes during the year

Urban sites can have lots of reflected light

Window Apertures: shape and location Horizontal shapes Vertical shapes Consider reflected light Transoms Skylights 10

Light pipes

Room shape

Light shelf principles

Skylight with integral HVAC return system

Interior Surfaces Ceilings: matte finish, light color Chamfer to reflect daylight Floors and walls opposite windows can reflect daylight 34

Windows and Tasks Locate work areas parallel to windows Windows placed left of right-handed people; and vice versa Equipment and technology located out of direct sunlight Best lighting for a lab? 36

Tune into the next lecture for the exciting conclusion of this chapter