EULUMDAT File Format Specification

Proposal for a Data Format for Exchange of Luminaire Data (Interior, Exterior, and/or Road Lighting Luminaires) Under the Operating Systems MS-DOS 2.x/3.xx Under Condition of Unequivocal Coordination Between Luminaire and Data Set

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

1. Only linear luminaires (Ityp = 2) are being subdivided in longitudinal and transverse directions.

2. 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

3. Each field is an ASCII string that is terminated with an MS-DOS <CR><LF> pair.

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