/usr/share/radiance/source/headlamp/lowbeam.rad is in radiance-materials 4R1+20120125-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | # ies2rad -l /lumen/lumen/ray/lib -p source/ies -di -t default
# Dimensions in inches
#<GE 6014 HEADLAMP
#<LOWBEAM
# 50 watt luminaire, lamp*ballast factor = 1
void brightdata lowbeam_dist
5 flatcorr source/ies/lowbeam.dat source.cal srcB_horiz srcB_vert
0
1 1
lowbeam_dist light lowbeam_light
0
0
3 31.9974 31.9974 31.9974
lowbeam_light polygon lowbeam.d
0
0
12
-3.48 -3.48 -0.00984252
-3.48 3.48 -0.00984252
3.48 3.48 -0.00984252
3.48 -3.48 -0.00984252
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