Illuminance plots of ge8918

(as computed by ies2tab from that IES 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 8918
# [MANUFAC] GE Lighting Systems - Hendersonville  NC  USA
# [LUMCAT] (not specific to a single catalog number)
# [LUMINAIRE] GE DIMENSION (DMY)               
# [LAMP] HPS 750                       
# [OTHER] Distribution: HTV       
# [MORE] Socket Pos: 2                             
# [MORE] Comments: HORIZONTAL LAMP               YOKE MTG                      
# [MORE] Revision No:  0  Rev Date: 930412  Test Date: 93030103
# [MORE] Reflector: 440056-01                       Refractor: CLEAR 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: ies/ge8918.ies
# Luminaire flux =   749 lm,
#                   74.9 % of the bulb flux
# between 75 and 90:  2.2 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  26.0 cd/1000lm ,  0.5 % of the luminaire flux
# 90deg and above:  max   0.0 cd/1000lm ,  0.0 % of the luminaire flux
# CutOff Type: Full_CutOff    

# 62.5 deg to <67.5 deg:   max   248 cd/1000lm,
# 67.5 deg to <72.5 deg:   max   208 cd/1000lm,
# maximum spec. lum. intensity   278 cd/1000lm

# 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  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0  71.0
  5.0   112   106   105   115   143   116   114   114   114   116   116   119   125   128   131   137   140   140   140   140   140   138   138   136   132   130   126   117   113   109  96.0  76.0  67.0  68.0  75.0  78.0
 15.0   160   119   146   154   165   164   167   168   168   168   168   168   168   168   168   168   168   168   170   170   170   170   170   170   172   172   172   173   173   172   171   166   167   144   131   124
 25.0   166   124   131   169   174   181   186   188   190   192   194   196   202   204   205   208   209   210   210   211   210   207   206   205   203   202   202   202   202   201   198   187   176   178   158   148
 35.0   158   120   148   170   184   199   218   224   229   240   245   249   256   260   262   267   269   271   276   278   278   276   276   270   260   254   247   233   226   221   207   194   176   168   144   132
 45.0   135   102   130   146   162   178   193   198   200   206   208   209   212   213   212   209   208   208   206   206   207   209   210   212   214   216   214   208   206   198   176   160   149   146   137   132
 55.0  78.0  68.0  88.0   103   119   130   138   141   145   152   156   159   164   167   168   171   172   171   169   168   166   162   160   157   150   147   145   140   138   136   128   114   112   114   110   108
 60.0   110  98.0   109   117   132   144   152   155   158   172   180   188   194   200   206   212   215   218   220   220   220   210   202   194   182   176   170   160   154   149   146   132   130   138   147   152
 62.5   126   113   120   124   138   151   164   168   172   190   196   203   213   220   226   234   238   242   247   247   247   240   232   225   208   200   192   179   172   166   155   141   139   150   166   174
 65.0   142   128   130   131   144   158   173   176   181   196   202   208   222   226   230   232   236   239   244   246   248   246   242   237   224   217   210   194   188   180   164   150   148   162   184   195
 67.5   113   102   104   106   120   132   176   179   182   190   192   194   203   204   206   207   206   206   206   206   206   208   208   208   206   202   197   188   184   180   134   124   121   130   146   154
 70.0  84.0  76.0  77.0  80.0  97.0   105   160   160   159   158   158   157   160   159   158   157   156   156   154   154   153   153   153   153   152   151   150   150   149   148   105  99.0  94.0  98.0   109   114
 72.5  54.0  50.0  50.0  55.0  74.0  78.0   114   112   109   108   108   108   108   107   106   104   104   104   101   100   100  98.0  98.0  98.0  98.0  98.0  97.0  96.0  96.0  95.0  76.0  74.0  67.0  66.0  72.0  75.0
 75.0  25.0  24.0  24.0  30.0  50.0  52.0  52.0  50.0  48.0  46.0  46.0  46.0  47.0  46.0  47.0  48.0  48.0  50.0  49.0  49.0  48.0  48.0  46.0  46.0  46.0  46.0  45.0  46.0  46.0  46.0  46.0  48.0  40.0  34.0  34.0  34.0
 77.5  19.0  18.0  18.0  23.0  38.0  39.0  16.0  15.0  14.0  14.0  14.0  14.0  13.0  12.0  11.0   9.0   9.0   9.0   8.0   8.0   8.0   8.0   8.0   9.0  12.0  12.0  13.0  14.0  14.0  15.0  35.0  36.0  30.0  26.0  26.0  26.0
 80.0  13.0  12.0  12.0  16.0  26.0  26.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   3.0   3.0   3.0   3.0   3.0   3.0   3.0   3.0   3.0   3.0   4.0   4.0   4.0   4.0   4.0  24.0  24.0  20.0  18.0  17.0  16.0
 82.5   7.0   6.0   6.0   8.0  14.0  14.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0  12.0  12.0  10.0  10.0   8.0   7.0
 85.0   1.0   1.0   1.0   1.0   1.0   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   1.0   1.0   1.0   1.0   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