Title: Reading and Audio-Visual Assignments
Course: WGF 107 DEVELOPMENT > Section: Content

Title | Reading and Audio-Visual Assignments
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Sub-Title | Initial Lighting Level – Depreciation – Minimal Standards – Lighting Surveys & Audits
Content | The Illuminating Engineering Society of North America (IESNA) has determined a range of suitable light levels measured in foot-candles for certain indoor tasks. Nine categories cover typical office, institutional, and educational settings. Five of the IESNA-recommended light levels for residential and mixed-use buildings are listed in Table 1.1 (above). Many states have also incorporated American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) Standard 90.1 into their energy codes. ASHRAE 90.1 requires new and renovated spaces to meet strict power densities and lighting control measures. Similarly, California’s Titles 20 (commercial buildings) and 24 (residential buildings) have very specific requirements for power densities and controls addressing various building areas.
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Content
Many fluorescent lighting systems put in place a decade or more ago provide too much light or provide low quality or inappropriate lighting for current use. For example, glare is a common complaint. These 10- to 15-year-old systems

also tend to use more energy and produce excess heat. In addition, dark color walls and floorings, and dirt/dust in older or less well maintained buildings, “absorb” light levels, causing them to appear dark. Strategies to bring these spaces into conformation with IESNA recommendations include:

·        Bringing overlit areas to more comfortable levels through de-lamping

·        Improving existing fixtures (through add-ons) to distribute and improve light quality

·        Improving areas with poor quality lighting through re-lamping with appropriate lamp types

·        Retrofitting or replacing existing systems with the most efficient luminaires

·        Cleaning or painting interior walls with lighter colors to maximize the illumination level.
Link/Upload | Daylighting – Whole Building Design Guide http://www.wbdg.org/resources/daylighting.php Lighting – Chapter 4 (Green Building O&M Manual – Green Seal http://www.greenseal.org/Portals/0/Documents/IG/PHA%20Manuals/Chapter4_Green_Building_OM_Manual_PHA.pdf
Attributions | Image and Content courtesy of Green Seal