Info: Definitions of IES Roadway Luminaire Classifications (Types I, II, III, IV and V)
Summary: The Illuminating Engineering Society of North America (IESNA) defines roadway and area lighting fixtures by their photometric properties and distance to the hal
- 2006-08-15 - Similar Articles

Info: Color and Reflectance
Summary: The calculated (and measured) illuminance values for two rooms with the same surface reflectances will vary, depending on the color of the surfaces. The values
- 2006-08-15 - Similar Articles

Info: Type A, Type B and Type C photometry
Summary: This article discusses the three photometric data categories: Type A, Type B and Type C. These types describe the photometric web surrounding the light source and w
- 2006-08-28 - Similar Articles

Info: Differences between Uniformity Gradient (UG) and Max-to-Min Ratio
Summary: In some cases the Uniformity Gradient (UG) and Max-to-Min Ratio look like they should/could be the same. However the calculated values are different. More informa
- 2006-11-20 - Similar Articles

Info: Illuminance, Exitance, and Luminance
Summary: Illuminance is a measure of light incident on a surface (or at a point). Exitance is a measure of light leaving a point or a surface. Luminance directly relates to
- 2007-04-05 - Similar Articles

Info: Definitions of IESNA Luminaire Classification System (LCS) and BUG Ratings
Summary: The Illuminating Engineering Society of North America (IESNA) defines the light distribution and optical control of roadway and area lighting luminaires by the&
- 2007-04-06 - Similar Articles

Info: European photometric testing conventions and compatibility with North American standards (IESNA)
Summary: With the increasing availability of European manufactured luminaires in the North American market, it is essential that users of computation software understand pos
- 2007-04-25 - Similar Articles

Info: Photopic, Mesopic and Scotopic: Definitions and Relevance to Lighting Calculations
Summary: The terms photopic, mesopic and scotopic refer to three ranges of human vision adaptation level, which differ in anatomical response, spectrum and their effe
- 2008-02-25 - Similar Articles

Info: Transmission of light through water
Summary:  While AGi32 cannot exactly simulate the propagation of light through participating media such as cloudy (“turbid”) water, it is quite capable of a
- 2009-09-28 - Similar Articles