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Lighting: Designing with Daylight. 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 - PowerPoint PPT Presentation
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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.