1 |
Enclosing IES File Notes |
2 |
SCCSid "$SunId$ LBL" |
3 |
|
4 |
The following notes describe how MGF data is to be referred to by |
5 |
an enclosing IES luminaire file, and these notes are in a state of flux. |
6 |
|
7 |
The basic method for specifying an MGF geometry file within an IES |
8 |
file is a single line immediately preceeding the TILT= line, which reads: |
9 |
|
10 |
GEOM=file.mgf |
11 |
|
12 |
where "file.mgf" is replaced by the name of the relevant MGF file. |
13 |
|
14 |
IES data file contains simplified geometry, which must completely |
15 |
enclose the detailed geometry specified by the "GEOM=file.mgf" line. |
16 |
This detailed geometry file is always in meters, whatever the units of |
17 |
the enclosing IES file, and must have its origin at the center of the |
18 |
simplified geometry. The X-axis corresponds to the 0-180 degree plane, |
19 |
the Y-axis corresponds to the 90-270 degree plane, and the Z-axis |
20 |
corresponds to the up direction. (This is a right-handed coordinate |
21 |
system.) |
22 |
|
23 |
The emission values in the MGF file will be multiplied by the usual |
24 |
IES luminaire factors, i.e. the tilt factors (if any), the candela |
25 |
multiplier, the ballast factor and the ballast lamp factor. Thus, |
26 |
the MGF file emissions should correspond to those of the as-tested |
27 |
luminaire configuration. |