Illuminance plots of Ge8271a

(as computed by ies2tab from that photometry file)

spacing 5 plot single luminaire plot
In the left half of the left plot, specific illuminance by a continuous row of luminaires spaced 5 heights is shown (right half is for a single luminaire). The right plot is for a single luminaire, unrotated.

illuminance scale

Values below the scale are illuminance / 1 lx. This is for (unrealistic) “unit” case that luminaires would have lamps producing 1 klm only, would be point-like and just 1 m over the terrain.

ies2tab text output:

   
       
# IESNA91
# [TEST] GE 8271
# [MANUFAC] GE Lighting Systems - Hendersonville  NC  USA
# [LUMCAT] (not specific to a single catalog number)
# [LUMINAIRE] GE SCM 175                       
# [LAMP] MET 70 MED                   
# [OTHER] Distribution: M-C-III   
# [MORE] Socket Pos: B                             
# [MORE] Comments: -                             -                             
# [MORE] Revision No:  0  Rev Date: 940413  Test Date: 90082003
# [MORE] Reflector: 35-232112-13                    Refractor: FLAT GLASS                    
# TILT=NONE
# Bulbs: 1,   5300 lm each
# Number of measured angles:  20 vertical,  36 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous opening diameter (and height?):   1.500  (   0.000 )
# Ballast factor: 1,  Input power:   70 W


# Source file: /tmp/Ge8271a.IES
# Luminaire flux =   645 lm,
#                   12.2 % of the bulb flux
# between 75 and 90:  2.6 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   2.6 cd / 1000 lm ,  0.1 % of the luminaire flux
# 90deg and above:  max   0.0 cd / 1000 lm ,  0.0 % of the luminaire flux
# CutOff Type: Full_CutOff    

# 62.5 deg to <67.5 deg:   max    45 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max    64 cd / 1000 lm,
# maximum spec. lum. intensity    64 cd / 1000 lm

# The following table gives luminous intensities which would be produced
# using a hypothetic bulb giving a luminous flux of 1000 lm (i.e., cd/klm):

#  H:   0.0   5.0  15.0  25.0  35.0  45.0  52.5  55.0  57.5  62.5  65.0  67.5  72.5  75.0  77.5  82.5  85.0  87.5  92.5  95.0  97.5 102.5 105.0 107.5 112.5 115.0 117.5 122.5 125.0 127.5 135.0 145.0 155.0 165.0 175.0 180.0
#V:  
  0.0  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5  42.5
  5.0  44.0  44.5  44.7  44.9  45.3  45.5  45.7  45.7  45.7  45.7  45.7  45.7  45.7  45.7  45.7  45.5  45.5  45.5  45.3  45.3  45.3  44.9  44.9  44.9  44.7  44.7  44.5  44.0  43.8  43.6  43.0  42.3  41.7  41.5  41.1  40.9
 15.0  50.4  49.4  50.2  51.3  51.7  50.6  50.2  50.2  50.0  49.8  49.6  49.6  49.6  49.6  49.4  49.2  49.1  48.5  47.5  47.0  46.6  45.7  45.3  44.9  44.5  44.2  43.8  43.0  42.6  42.1  40.4  38.9  38.1  37.7  37.7  37.7
 25.0  37.0  37.7  41.5  44.2  43.0  39.6  40.2  40.4  41.3  43.0  44.0  44.2  44.3  44.5  43.6  41.5  40.6  39.6  37.5  36.6  36.0  34.9  34.3  34.0  32.8  32.5  32.5  32.1  32.1  31.7  30.8  28.9  26.8  24.7  23.8  23.4
 35.0  33.4  33.6  34.0  34.2  32.5  31.5  32.3  32.5  33.6  35.8  37.0  37.4  37.7  38.1  36.2  32.6  30.8  30.2  28.9  28.3  27.9  27.5  27.2  27.2  26.8  26.8  26.4  25.7  25.3  24.7  23.0  21.5  20.4  19.6  18.9  18.5
 45.0  30.0  28.9  28.3  26.4  25.3  27.2  28.1  28.5  29.4  31.5  32.5  31.7  30.6  29.8  29.2  28.1  27.5  27.2  26.8  26.4  25.8  24.7  24.2  24.0  23.6  23.4  23.0  22.5  22.1  21.3  18.9  17.7  17.7  18.3  17.7  17.4
 55.0  14.0  15.1  20.8  27.5  29.2  28.1  35.1  37.4  35.7  32.5  30.8  30.2  28.7  28.1  28.5  29.1  29.4  29.4  29.4  29.4  28.7  27.5  26.8  25.7  23.8  22.6  22.3  21.9  21.5  20.4  17.4  16.0  15.1  14.3  13.6  13.2
 60.0  10.2  10.8  14.7  19.2  22.3  26.0  37.0  36.6  36.2  33.2  32.3  31.3  28.7  28.5  28.3  30.0  30.6  31.3  33.2  32.5  31.7  27.0  25.3  23.4  22.6  21.9  21.1  18.9  18.5  17.9  16.2  14.9  12.8  10.4   9.8   9.4
 62.5   8.3   8.7  11.7  15.1  18.7  25.1  38.1  37.7  37.4  35.1  34.3  33.6  30.0  29.8  29.4  30.9  32.3  33.6  37.7  36.0  34.3  27.7  25.7  23.8  21.9  21.3  20.8  18.7  18.1  17.5  15.7  14.3  11.7   8.3   7.9   7.7
 65.0   6.2   6.4   8.7  11.1  15.1  24.2  38.3  38.5  38.7  40.0  40.2  40.6  34.3  32.8  31.3  32.1  34.7  37.5  45.5  41.5  37.5  26.8  24.5  22.3  20.2  19.6  18.9  17.4  16.6  16.0  15.1  13.8  10.6   6.4   6.0   5.8
 67.5   4.9   5.3   6.8   9.1  12.6  19.2  32.5  35.8  39.2  47.9  47.5  47.4  36.6  32.1  27.4  29.8  32.3  34.7  44.3  35.8  27.5  12.8  10.9   9.1   7.9   7.4   6.8   6.4   6.2   6.0  11.3  10.6   7.9   4.9   4.7   4.5
 70.0   3.4   4.2   4.9   6.8  10.2  14.5  26.6  32.1  37.7  52.8  53.2  53.4  52.5  49.8  47.2  46.4  47.5  48.9  58.1  44.5  30.8  11.5   9.1   6.8   4.7   4.2   3.4   2.8   3.0   3.4   7.7   7.2   5.5   3.6   3.4   3.4
 72.5   1.9   3.0   3.0   4.5   7.7   9.8  27.9  36.6  45.3  58.5  61.1  63.8  56.6  53.6  50.6  51.7  49.6  47.5  50.0  38.9  27.5   8.7   6.8   5.1   3.8   3.2   2.6   1.9   1.9   2.1   4.2   3.8   3.0   2.3   2.3   2.3
 75.0   0.4   1.9   0.9   2.3   5.3   4.9  21.5  30.6  39.6  58.9  55.5  51.7  35.7  30.2  25.1  31.9  32.6  33.4  32.8  24.9  17.0   6.0   4.9   3.8   2.6   2.3   2.1   3.8   2.3   0.9   0.4   0.6   0.4   0.8   0.9   1.1
 77.5   0.4   1.5   0.8   1.7   4.0   3.8   9.4  17.5  25.7  33.8  29.4  25.3  13.8  10.6   7.2  10.8  10.6  10.4  10.8   8.3   5.7   2.3   1.9   1.7   0.8   0.6   0.4   0.2   0.0   0.0   0.4   0.4   0.4   0.6   0.8   0.8
 80.0   0.2   0.9   0.4   1.1   2.6   2.5   0.4   0.9   1.5   1.1   0.9   0.8   0.4   0.4   0.4   0.4   0.4   0.4   0.4   0.4   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   0.4   0.2   0.4   0.4   0.4
 82.5   0.0   0.4   0.2   0.6   1.3   1.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   0.0   0.2   0.2   0.2
 85.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
 87.5   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
 90.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0