Illuminance plots

produced from photometry file ovh1m2d.ies

spacing 5 plot spacing 6 plot single luminaire plot
In left plots, specific illuminances by a continuous row of luminaires spaced 5 and 6 heights are shown in their left halves (right half concerns 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:

   
       
# IESNA: LM-63-1995
# [TEST] 767382
# [DATE] 7/26/95
# [MANUFAC] COOPER LIGHTING
# [LUMCAT] OVH17MXX2D  
# [LUMINAIRE] 175W MH TYPE II ROADWAY
# [LAMP] 175W MH CL ED-28
# [_REFLECTOR] HYDROFORMED ALUMINUM
# [_REFRACTOR] FLAT GLASS
# [_SOCKET POSITION]  HORIZONTAL
# [_LAMP LUMENS]  14000
# TILT=NONE
# Bulbs: 1,  14000 lm each
# Number of measured angles:  37 vertical,  21 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous openig width, length and height:   0.000   0.000   0.000
# Ballast factor: 1,  Input power:  175 W


# Source file: ovh1m2d.ies
# Luminaire flux = 10695 lm,
#                   76.4 % of the bulb flux
# between 75 and 90:  2.3 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  36.0 cd / 1000 lm ,  0.2 % 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   673 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max  1023 cd / 1000 lm,
# maximum spec. lum. intensity  1023 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  55.0  65.0  75.0  85.0  90.0  95.0 105.0 115.0 125.0 135.0 145.0 155.0 165.0 175.0 180.0
#V:  
  0.0   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122   122
  2.5   130   130   130   129   128   128   127   121   126   124   124   124   122   123   122   122   121   121   121   120   121
  5.0   135   135   135   135   134   132   131   122   129   127   125   124   123   122   121   121   118   117   117   116   115
  7.5   148   145   145   145   143   140   138   127   133   132   128   127   125   124   121   120   119   117   113   112   112
 10.0   162   161   160   158   152   149   145   133   137   136   132   130   128   127   124   121   120   118   112   110   110
 12.5   181   182   179   173   163   157   150   139   139   136   133   131   129   126   125   123   121   115   110   106   106
 15.0   214   215   211   197   183   167   158   142   143   137   134   133   130   125   127   130   123   115   108   106   105
 17.5   272   271   260   238   210   173   164   145   145   138   135   133   127   121   125   139   124   100   107   106   105
 20.0   356   359   340   297   250   194   172   150   147   140   136   133   125   117   117   132   123  94.8   104   105   105
 22.5   406   421   402   367   311   226   184   155   150   142   138   135   124   114   110   117   116  89.1   100   106   108
 25.0   433   443   427   404   369   268   205   165   154   143   139   136   124   113   106   106   104  85.7  96.5   107   111
 27.5   422   431   429   424   390   304   236   180   161   145   140   136   125   112   106   101  96.9  87.4  93.5   107   112
 30.0   323   333   361   406   391   324   265   209   167   148   140   134   124   111   105  98.6  93.5  88.7  88.7   102   111
 32.5   240   238   263   324   353   344   296   237   181   157   144   136   121   109   104  97.8  91.4  85.3  83.6  93.5   104
 35.0   193   187   200   235   293   348   341   263   212   177   154   140   121   108   103  96.1  88.7  82.3  78.9  83.1  88.3
 37.5   167   162   177   193   253   343   404   309   271   193   160   143   120   108   102  95.6  86.1  78.0  73.7  75.4  75.4
 40.0   152   151   151   178   249   387   489   416   343   210   172   148   121   107   102  94.4  84.0  75.9  70.3  70.3  70.3
 42.5   144   143   145   187   263   412   497   496   418   215   179   154   123   110   103  94.8  83.6  72.4  67.3  66.0  66.0
 45.0   134   134   139   179   245   336   385   415   356   209   185   167   130   112   104  93.9  82.3  71.1  64.3  63.0  62.6
 47.5   126   126   128   150   202   222   299   298   288   217   195   178   136   112   104  93.1  81.0  69.0  62.1  60.9  60.0
 50.0   119   118   119   131   169   185   259   278   284   247   201   183   140   112   104  94.4  80.6  67.7  62.1  63.0  63.4
 52.5   114   112   109   128   156   165   227   267   291   285   202   184   138   112   104  91.4  78.9  65.1  61.3  69.9  73.7
 55.0   118   112   101   122   146   154   196   271   299   280   200   181   138   113   107  92.2  77.6  63.9  62.6  81.9  88.3
 57.5   130   112  91.8   110   133   154   181   321   302   254   199   177   136   113   109  93.1  75.9  60.9  62.1  84.4  92.6
 60.0   138   112  84.9   102   125   170   180   311   320   233   202   173   136   112   109  93.1  74.1  58.3  61.3  83.1  93.5
 62.5   117   102  77.6  94.8   123   178   205   389   437   197   179   166   130   109   105  90.9  71.1  54.9  55.3  84.9   101
 65.0  93.5  83.6  69.0  85.7   109   148   271   563   673   174   162   155   125   105  99.9  87.4  69.4  52.7  49.7  93.5   124
 67.5  69.4  65.1  61.3  77.6  92.2   116   268   718   882   163   134   124  99.1  81.0  81.4  74.6  60.9  44.6  42.4   101   151
 70.0  51.4  49.3  52.3  67.3  79.7  95.2   183   738  1023   120  82.3  63.4  54.9  40.3  36.4  33.0  33.4  30.4  31.3  96.1   166
 72.5  36.9  36.4  42.9  57.9  68.1  69.9  96.9   519   904  98.6  53.1  36.4  42.0  33.4  23.6  17.6  13.7  14.6  18.9  69.9   135
 75.0  25.7  24.4  25.7  33.4  34.7  19.7  47.6   208   501  76.7  37.7  25.3  34.7  28.7  17.1  11.1   7.7   7.3   6.0  34.3  58.3
 77.5   4.3   4.3   4.3   4.3   5.1  16.3  25.7  56.1   177  47.1  25.3  15.9  21.9  18.0  10.3   6.9   5.6   4.7   3.0  13.7  19.7
 80.0   2.6   1.7   2.1   2.1   2.1   6.4   9.0   8.6  36.0  18.0  11.1   7.7   9.9   7.7   6.0   4.3   3.4   2.6   1.7   5.6   6.9
 82.5   0.9   0.9   0.9   0.9   0.9   1.7   3.0   2.6   6.9   5.1   3.4   3.0   3.4   3.0   2.1   2.1   1.7   1.3   0.4   2.1   2.6
 85.0   0.0   0.4   0.0   0.0   0.0   0.4   0.9   0.9   1.7   1.3   0.9   0.9   0.4   0.9   0.9   0.9   0.4   0.0   0.0   0.4   0.9
 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   0.4   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