/usr/share/radiance/source/spi/std33 is in radiance-materials 4R1+20120125-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# STD33 13 watt PL fluorescent fixture for desk illumination
#
# 17Apr1989
#
# Units are in inches, origin at top center, lamp oriented along
# y-axis, 0 degrees azimuth along x-axis.
#
void plastic dark_plastic
0
0
5 .2 .2 .2 0 0
void brightdata std33_output
9 flatcorr source/spi/std33.dat source.cal src_theta src_phi2 -t 0 0 -2
0
0
# The following multiplies by the reciprocal of the area in square meters:
std33_output glow std33_light
0
0
4 20.66 20.66 20.66 150
# xform -t -3.75 -5 -2
# genrbox dark_plastic std33 7.5 10 2
dark_plastic polygon std33.1540
0
0
12
3.75 -5 -2
3.75 -5 0
-3.75 -5 0
-3.75 -5 -2
dark_plastic polygon std33.4620
0
0
12
-3.75 -5 0
-3.75 5 0
-3.75 5 -2
-3.75 -5 -2
std33_light polygon std33.source
0
0
12
-3.75 5 -2
3.75 5 -2
3.75 -5 -2
-3.75 -5 -2
dark_plastic polygon std33.3267
0
0
12
3.75 5 -2
-3.75 5 -2
-3.75 5 0
3.75 5 0
dark_plastic polygon std33.5137
0
0
12
3.75 -5 0
3.75 -5 -2
3.75 5 -2
3.75 5 0
dark_plastic polygon std33.6457
0
0
12
-3.75 5 0
-3.75 -5 0
3.75 -5 0
3.75 5 0
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