![]() This allows projectors to be more easily compared on the basis of their brightness specifications. ANSI lumen measurements are in general more accurate than the other measurement techniques used in the projector industry. For marketing purposes, the luminous flux of projectors that have been tested according to this procedure may be quoted in "ANSI lumens", to distinguish devices that have been so tested from those tested by other methods. A standardized procedure for testing projectors has been established by the American National Standards Institute, which involves averaging together several measurements taken at different positions. The light output of projectors (including video projectors) is typically measured in lumens. See Luminous efficacy for the specific efficiency of various types of electric light sources. The lumen can be thought of casually as a measure of the total "amount" of visible light in some defined beam or angle, or emitted from some source.Ī standard North American 100 watt incandescent light bulb emits approximately 1700 lumens, while a 100 watt Sodium vapor lamp emits around 15000 lumens, about 8 times as much. One lumen is the amount of light emitted in a solid angle of 1 sr, from a source that radiates to an equal extent in all directions, and whose intensity is 1 cd. It is defined in terms of candela steradian s (cd multiplied by sr). Alternatively, an isotropic one-candela light source emits a total luminous flux of exactly 4π lumens. The lumen (symbolized lm) is the International Unit of luminous flux. He has restored a 1969 Shelby GT500 and a 1970 AMC AMX.Įd and his family live in Northern Virginia where he held multiple leadership roles at The Virginia Hospital Center, including serving as a member of The Foundation Board.If a light source emits one candela of luminous intensity uniformly across a solid angle of one steradian, its total luminous flux emitted into that angle is one lumen. Prior to joining Level 3, Ed held global and North American roles at Sprint Corporation, Sprint International, Global One, Teleglobe and Igaea Communications.Įd holds bachelor’s and professional degrees in architecture from the Catholic University of America.Įd believes in providing solutions that help customers build for the future, saying, “the best way to help businesses is to be a partner who not only understands their hopes but also their worries.” He believes the best answer to unpredictability is always “yes, we will be there to help you”.īorn in Detroit, Michigan and later raised in New Jersey, Ed is an avid Detroit Lions fan and a muscle car enthusiast. The interior of the gastrointestinal tract. It can refer to: The interior of a vessel, such as the central space in an artery, vein or capillary through which blood flows. His responsibilities include medium, large and multinational enterprise customers, as well as government agencies, large educational institutions and research networks.Įd previously served in several senior leadership roles at Level 3 Communications. In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine. ![]() Ed brings more than 25 years of experience to this role which focuses on delivering technology solutions and helping businesses build for the future. The definition of Illuminance (since it involves an observer) is far more complicated. Ed Morche is President of Lumen’s North America Enterprise and Public Sector team. The definition for Luminous Emittance is a little odd since you say it depends on Luminous emittance You should say it depends on Luminosity (in lm) and source size (in m2), which makes a great deal of sense since lux lm/m2.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |