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Content DescriptionThis Technical Memorandum (TM) addresses how the Spectral Power Distribution (SPD) of light sources can be incorporated into the IES Illuminance Determination System for visual tasks that are categorized as P through Y within interior lighting applications. The summary of research investigations included in this TM describes how light spectrum affects pupil size, visual acuity, and visual efficiency under the conditions of interior lighting conditions, and concludes that light source SPD can be factored into lighting calculations for interior lighting applications under limited conditions when visual tasks require the ability to discern visual detail to ensure speed and/or accuracy in the performance of the visual task. These tasks are defined in this TM as visually demanding tasks and are a subset of visual tasks within IES Category P through Y of the Illuminance Determination System. This TM introduces the Equivalent Visual Efficiency (EVE) calculation and provides general guidelines and relevant caveats for its use. The calculation is optional and its use should be balanced with other lighting design criteria and objectives.Subscription InformationMADCAD.com IES subscriptions are annual and access is concurrency based (number of people that can access the subscription at any given time).
Some features of MADCAD.com IES Subscriptions are:
- Floating concurrency model: Set your concurrency level and share your IES Subscriptions among your offices enterprise-wide.
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For any further information on MADCAD.com IES Subscriptions, please contact us at info@madcad.com or +1 800.798.9296. About IESThe Illuminating Engineering Society of North America (IES) is the recognized technical authority on illumination. For over 100 years; its objective has been to communicate information on all aspects of good lighting practice to its members, to the lighting community, and to consumers, through a variety of programs, publications, and services. |
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