Illuminance plots of Ge8271

(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 100 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,   1000 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:    1 W


# Source file: /tmp/Ge8271.IES
# Luminaire flux =   645 lm,
#                   64.5 % 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  14.0 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   241 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   338 cd / 1000 lm,
# maximum spec. lum. intensity   338 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   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225   225
  5.0   233   236   237   238   240   241   242   242   242   242   242   242   242   242   242   241   241   241   240   240   240   238   238   238   237   237   236   233   232   231   228   224   221   220   218   217
 15.0   267   262   266   272   274   268   266   266   265   264   263   263   263   263   262   261   260   257   252   249   247   242   240   238   236   234   232   228   226   223   214   206   202   200   200   200
 25.0   196   200   220   234   228   210   213   214   219   228   233   234   235   236   231   220   215   210   199   194   191   185   182   180   174   172   172   170   170   168   163   153   142   131   126   124
 35.0   177   178   180   181   172   167   171   172   178   190   196   198   200   202   192   173   163   160   153   150   148   146   144   144   142   142   140   136   134   131   122   114   108   104   100  98.0
 45.0   159   153   150   140   134   144   149   151   156   167   172   168   162   158   155   149   146   144   142   140   137   131   128   127   125   124   122   119   117   113   100  94.0  94.0  97.0  94.0  92.0
 55.0  74.0  80.0   110   146   155   149   186   198   189   172   163   160   152   149   151   154   156   156   156   156   152   146   142   136   126   120   118   116   114   108  92.0  85.0  80.0  76.0  72.0  70.0
 60.0  54.0  57.0  78.0   102   118   138   196   194   192   176   171   166   152   151   150   159   162   166   176   172   168   143   134   124   120   116   112   100  98.0  95.0  86.0  79.0  68.0  55.0  52.0  50.0
 62.5  44.0  46.0  62.0  80.0  99.0   133   202   200   198   186   182   178   159   158   156   164   171   178   200   191   182   147   136   126   116   113   110  99.0  96.0  93.0  83.0  76.0  62.0  44.0  42.0  41.0
 65.0  33.0  34.0  46.0  59.0  80.0   128   203   204   205   212   213   215   182   174   166   170   184   199   241   220   199   142   130   118   107   104   100  92.0  88.0  85.0  80.0  73.0  56.0  34.0  32.0  31.0
 67.5  26.0  28.0  36.0  48.0  67.0   102   172   190   208   254   252   251   194   170   145   158   171   184   235   190   146  68.0  58.0  48.0  42.0  39.0  36.0  34.0  33.0  32.0  60.0  56.0  42.0  26.0  25.0  24.0
 70.0  18.0  22.0  26.0  36.0  54.0  77.0   141   170   200   280   282   283   278   264   250   246   252   259   308   236   163  61.0  48.0  36.0  25.0  22.0  18.0  15.0  16.0  18.0  41.0  38.0  29.0  19.0  18.0  18.0
 72.5  10.0  16.0  16.0  24.0  41.0  52.0   148   194   240   310   324   338   300   284   268   274   263   252   265   206   146  46.0  36.0  27.0  20.0  17.0  14.0  10.0  10.0  11.0  22.0  20.0  16.0  12.0  12.0  12.0
 75.0   2.0  10.0   5.0  12.0  28.0  26.0   114   162   210   312   294   274   189   160   133   169   173   177   174   132  90.0  32.0  26.0  20.0  14.0  12.0  11.0  20.0  12.0   5.0   2.0   3.0   2.0   4.0   5.0   6.0
 77.5   2.0   8.0   4.0   9.0  21.0  20.0  50.0  93.0   136   179   156   134  73.0  56.0  38.0  57.0  56.0  55.0  57.0  44.0  30.0  12.0  10.0   9.0   4.0   3.0   2.0   1.0   0.0   0.0   2.0   2.0   2.0   3.0   4.0   4.0
 80.0   1.0   5.0   2.0   6.0  14.0  13.0   2.0   5.0   8.0   6.0   5.0   4.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   1.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.0   2.0   1.0   2.0   2.0   2.0
 82.5   0.0   2.0   1.0   3.0   7.0   6.0   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   1.0   0.0   1.0   1.0   1.0
 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