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.\" RCSid $Id$ |
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.TH LAMP.TAB 5 2021-08-18 RADIANCE |
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.SH NAME |
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lamp.tab \- table of lamp colors and lumen depreciation factors |
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.SH DESCRIPTION |
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Lamp.tab contains a table of lamp data. The lines are formatted thus: |
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.IP |
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.RI / "light source name re" / |
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.I x y m |
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.PP |
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or |
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.IP |
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.RI / "light source alias re" / |
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.RI ( "light source name" ) |
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.PP |
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The first form gives the color and depreciation of a lamp whose name |
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matches the light source name regular expression. The second gives |
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an alternate name for a light source. Comments beginning with '#' |
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are supported. |
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.SS Notes |
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.IP \(bu |
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Basic regular expressions (original grep) are used. |
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.IP \(bu |
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.I x |
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and |
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.I y |
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are CIE x and y coordinates. These give the color of the light. See |
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.UR https://www.iso.org/standard/74165.html |
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ISO/CIE 11664-3:2019 |
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.UE |
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\*(lqColorimetry \(em Part 3: Cie Tristimulus Values\*(rq for |
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definitions. |
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.IP \(bu |
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.I m |
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is a "coefficient of depreciation." This is a multiplier used to |
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reduce the output of a lamp to the value it would have after it has |
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been in operation for its expected life. It is used to predict the |
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output of a lighting system comprised of many lamps. See the |
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.I IES Lighting Handbook |
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for more information. |
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.IP \(bu |
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Any character except '#' may be used to delimit the light source name |
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regular expression; '/' is conventional, but not required. |
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.IP \(bu |
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Comments begin with '#' and may occur at the end of any line. |
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.IP \(bu |
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Blank lines are ignored. |
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.SH AUTHOR |
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Greg Ward |
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.SH SEE ALSO |
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.BR ies2rad (1), |
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.BR pfilt (1) |
