KeyLIGHTS
Appendix B – EULUMDAT File Format Specification
The following table describes the format (layout) of the LDT photometry file. This specification is followed by the KeyLIGHTS photometry file selector.
|
Item |
Designation |
Number of Characters |
|---|---|---|
|
1 |
Company identification/data bank/version/format identification max. |
Max. 78 |
|
2 |
Type indicator Ityp (1 - point source with symmetry about the vertical axis; 2 - linear luminaire; 3 - point source with any other symmetry) [See Note 1] |
1 |
|
3 |
Symmetry indicator Isym (0 - no symmetry; 1 - symmetry about the vertical axis; 2- symmetry to plane C0-C180; 3- symmetry to plane C90-C270; 4- symmetry to plane C0-C180 and to plane C90-C270) |
1 |
|
4 |
Number Mc of C-planes between 0 and 360 degrees (usually 24 for interior, 36 for road lighting luminaires) |
2 |
|
5 |
Distance Dc between C-planes (Dc = 0 for non-equidistantly available C-planes) |
5 |
|
6 |
Number Ng of luminous intensities in each C-plane (usually 19 or 37) |
2 |
|
7 |
Distance Dg between luminous intensities per C-plane (Dg = 0 for non-equidistantly available luminous intensities in C-planes) |
5 |
|
8 |
Measurement report number |
Max. 78 |
|
9 |
Luminaire name |
Max. 78 |
|
10 |
Luminaire number |
Max. 78 |
|
11 |
File name |
8 |
|
12 |
Date/user |
Max. 78 |
|
13 |
Length/diameter of luminaire (mm) |
4 |
|
14 |
Width of luminaire b (mm) (b = 0 for circular luminaire) |
4 |
|
15 |
Height of luminaire (mm) |
4 |
|
16 |
Length/diameter of luminous area (mm) |
4 |
|
17 |
Width of luminous area b1 (mm) (b1 = 0 for circular luminous area of luminaire) |
4 |
|
18 |
Height of luminous area C0-plane (mm) |
4 |
|
19 |
Height of luminous area C90-plane (mm) |
4 |
|
20 |
Height of luminous area C180-plane (mm) |
4 |
|
21 |
Height of luminous area C270-plane (mm) |
4 |
|
22 |
Downward flux fraction DFF (%) |
4 |
|
23 |
Light output ratio luminaire LORL (%) |
4 |
|
24 |
Conversion factor for luminous intensities (depending on measurement) |
6 |
|
25 |
Tilt of luminaire during measurement (road lighting luminaires) |
6 |
|
26 |
Number n of standard sets of lamps (optional, also extendable on company-specific basis) |
4 |
|
26a |
Number of lamps |
n * 4 |
|
26b |
Type of lamps |
n * 24 |
|
26c |
Total luminous flux of lamps (lumens) |
n * 12 |
|
26d |
Color appearance / color temperature of lamps |
n * 16 |
|
26e |
Color rendering group / color rendering index |
n * 6 |
|
26f |
Wattage including ballast (watts) |
n * 8 |
|
27 |
Direct ratios DR for room indices k = 0.6 ... 5 (for determination of luminaire numbers according to utilization factor method) |
10 * 7 |
|
28 |
Angles C (beginning with 0 degrees) |
Mc * 6 |
|
29 |
Angles G (beginning with 0 degrees) |
Ng * 6 |
|
30 |
Luminous intensity distribution (candela / 1000 lumens) [See Note 2] |
(Mc2-Mc1+1) * Ng * 6 |
NOTES
- Only linear luminaires (Ityp = 2) are being subdivided in longitudinal and transverse directions.
- The parameters Mc1 and Mc2 for the luminous intensity distribution are determined by:
|
Isym |
Mc1 |
Mc2 |
|---|---|---|
|
0 |
1 |
Mc |
|
1 |
1 |
1 |
|
2 |
1 |
Mc / 2 + 1 |
|
3 |
3 * Mc / 4 + 1 |
Mc1 + Mc / 2 |
|
4 |
1 |
Mc / 4 + 1 |
- Each field is an ASCII string that is terminated with an MS-DOS <CR><LF> pair.