[Radiance-general] brightdata factor ?

[Christian Fusenig]

Hi @ all,

i created an IES file from measured data. This is the IES file:
---------------------------------
TILT=NONE
1 26000 1 26 1 1 2 -0.13 0 0 1 1 1000
0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30
  32.5 35 37.5 40 42.5 45 47.5 50 52.5 55 57.5 60 90
0
10457 10289 10178 10122 10019 9806 9687 9325 9095 8444
 7951  7068  6531  5755  5205 4939 4718 4431 4325 4319 
 4457  4591  4966  5406  5919   
0
-------------------------------------

Converted to Radiance, the file looks like this:

-------------------------------------------
# ies2rad -t default -c 1.37798146 0.913149838 0.35163837 -m 1 -o 
light/1ff_100
# Dimensions in meters
# ...
#<[WATT]     1000
# 1000 watt luminaire, lamp*ballast factor = 1

void brightdata 1ff_100_dist
4 flatcorr light/1ff_100.dat source.cal src_theta
0
1 75.3396

1ff_100_dist illum 1ff_100_light
0
0
3 1.37798 0.91315 0.351638

1ff_100_light ring 1ff_100.d
0
0
8
    0 0 -0.00025
    0 0 -1
    0 0.065

## Translated from MGF Version 2.0
## mgf2rad -g 0.183848
## mgf2rad ies/ ##############################
------------------------------------------------------------

What i don't understand is the factor of  '75.3396' in line 3 of 
brightdata. Isn't it supposed to be '1'?
Thanks and regards,

Christian