Functions of Lighting – Allow a person to see without straining his or her eyes – Enhance the look of a room or space – Improve safety in areas that may.

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Functions of Lighting – Allow a person to see without straining his or her eyes – Enhance the look of a room or space – Improve safety in areas that may be hazardous Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Ambient Lighting – Provides general illumination indoors for daily activities, and outdoors for safety and security. Task Lighting – Provides focused lighting for specific tasks, such as under-counter kitchen lights, table lamps, or bathroom mirror lights. Accent Lighting – Draws attention to special features or enhances the aesthetic qualities of an indoor or outdoor environment. Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Types of Lighting – Natural light Light that is provided by the sun Strong sunlight can produce extreme glares and shadows – Artificial light Controllable and predictable – Flourescent lighting – High-intensity discharge lighting – Incandescent lighting – Low-pressure sodium lighting – Outdoor solar lighting – LED lighting A lighting comparison chart from the U.S. Department of Energy is available at ting_daylighting/index.cfm/mytopic= ting_daylighting/index.cfm/mytopic= A lighting comparison chart from the U.S. Department of Energy is available at ting_daylighting/index.cfm/mytopic= ting_daylighting/index.cfm/mytopic= Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Basic Types of Light Distribution – Indirect light The light is directed to a ceiling or wall and is reflected from that surface. – Direct light The light shines directly on an object or area. Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Basic Types of Light Distribution – Mixed light A comination of direct and indirect light Some light shines down on a surface and some light is reflected off of a surface – Diffused light The light is dispersed evenly in all directions. Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Illumination – The distribution of light on a horizontal surface. Lumen – A measurement of light emitted by a lamp. For example, a 100 – watt incandescent lamp produces about 1750 lumens. Footcandle – A lumen of light distributed over a 1-square- foot area. It is the measurement of the intensity of illumination. Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Efficacy – The ratio of light produced to energy consumed. It is measured as the number of lumens produced divided by the rate of electricity consumption (lumens per watt). Glare – The excessive brightness from a direct light source that makes it difficult to see what one wishes to see. Light quality – The measurement of how well people in a lighted space can see to do visual tasks and how visually comfortable they feel in that space. Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.