Primarily a study in control Source that does not consume electricity Connects us with the natural world

Flavors of Daylight Functional daylight – to serve task and spatial-defining

functions - diffuse Daylight Accenting – used to inspire certain moods and

create visual interest -

Direct Sunlight – least useful, most hazardous to design Excessively bright, creates glare, and unacceptable contrast. Heat and UV radiation is not controlled

Too Bright for our visual system Skylight – sunlight diffusing and scattering through

various states or our atmosphere Varies according to time of day and year, weather and atmospheric

conditions. Suits our visual system for long durations

Diffused Sunlight – introducing sunlight after interaction with a diffusing material Tinting or frosted material – more manageable light source.

Height and width of forms and facades greatly affect the surface available for daylighting

Glazing (windows) must be considered.

Latitude – The closer to the north/south poles the lower the sun will be in the sky throughout the year.

Cardinal Orientation - rising East and setting West sun have higher potential for direct exposure . Northern hemisphere – more south facing light Southern hemisphere – more north facing light

Side-light systems Overhanging soffit (page 114) Light Shelf (page 114) Light monitor (page 115) Clerestory window (page 115) Vertical shading (page 115)

Top-light Systems Skylight (page 116) Bounced skylight (page 116) Shielded skylight (page 117)

Diffusing – translucent acrylic, frosted class Creates a soft even texture like on a cloudy day.

Tinting – reducing transmittance of a transparent substrate

Mixed reviews, gloomy or dark perception to the outside

Fritting – transparent materials with lines etched or embedded in them.

Act like miniature louvers to reflect light at various angles

Daylight at work – accent feature

Intensity – Control of electrical fixtures as daylight changes

Photocells – lower light levels or help shade when daylight is to bright

Photocells, dimmers and time clocks

Color – Do not try to match daylight for CRI

Shape – daylight is delivered in long clean pieces or planes, or pools if controlled with light tubes.

Heat Gains - direct daylight gives heat build up – tinting or expensive glazing techniques can be used.

Glare and Contrast – Uncontrolled sunlight causes glare and intense contrast

Damage to Art, Fabric, and Other Materials – UV radiation and heat will damage dyes, inks, pigments, organic materials.

Excessive Window Light – understand the daylight received from picture windows.

Daylight is controllable and predictable. Natural element to be used when used with proper

controlling techniques such as draperies, curtains, blinds, etc.

Experiment with daylight design Use Sunlight and electrical lighting together for a better

design.