Illuminance plots

produced from photometry file ovh2s3d.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] 767386
# [DATE] 7/27/95
# [MANUFAC] COOPER LIGHTING
# [LUMCAT] OVH25SXX3D
# [LUMINAIRE] 250W HPS TYPE III ROADWAY
# [LAMP] 250W HPS CL E-18
# [_REFLECTOR] HYDROFORMED ALUMINUM
# [_REFRACTOR] FLAT GLASS  
# [_SOCKET POSITION] HORIZONTAL  
# [_LAMP LUMENS] 27500
# TILT=NONE
# Bulbs: 1,  27500 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:  250 W


# Source file: ovh2s3d.ies
# Luminaire flux = 18829 lm,
#                   68.5 % of the bulb flux
# between 75 and 90:  5.1 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  99.6 cd / 1000 lm ,  0.6 % 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   287 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   495 cd / 1000 lm,
# maximum spec. lum. intensity   495 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   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117   117
  2.5   113   120   117   120   120   120   119   119   118   114   117   117   117   117   116   116   116   112   115   112   114
  5.0   116   123   120   123   123   122   122   121   121   117   120   120   120   119   115   116   115   111   114   111   112
  7.5   120   128   124   127   127   126   125   123   123   119   122   123   123   123   119   118   115   110   113   109   111
 10.0   127   134   131   133   133   130   128   126   125   121   123   124   125   125   122   121   117   110   111   108   109
 12.5   136   143   139   141   139   135   132   129   126   121   124   123   124   124   123   122   118   110   110   106   108
 15.0   149   157   156   151   147   141   137   132   129   125   124   123   122   121   121   122   118   110   109   106   107
 17.5   172   180   175   166   157   148   141   136   131   127   125   124   120   118   117   120   118   109   107   106   107
 20.0   199   207   202   189   173   156   147   140   134   129   127   124   120   116   113   116   116   107   105   106   107
 22.5   216   226   219   210   194   168   152   144   137   129   129   126   121   115   110   111   113   105   102   105   108
 25.0   226   237   228   224   211   182   157   147   141   132   131   129   121   115   109   108   108   102  98.7   103   108
 27.5   233   244   234   231   218   193   163   149   144   134   132   129   122   115   109   105   103  97.5  95.3   101   106
 30.0   239   247   238   232   219   197   174   154   145   134   132   129   121   114   109   104  99.3  94.4  91.7  96.5   101
 32.5   240   247   240   231   217   202   189   160   146   134   131   128   120   112   107   102  96.7  91.6  88.5  90.2  94.2
 35.0   240   244   236   226   212   210   203   169   154   139   132   127   118   110   105   101  94.1  88.7  84.7  84.2  85.3
 37.5   236   238   227   218   211   224   230   193   173   145   134   128   116   109   104  98.1  91.6  85.7  81.0  78.8  78.5
 40.0   231   231   214   208   220   251   273   244   188   152   140   131   116   107   102  95.6  88.4  80.7  76.7  73.4  73.0
 42.5   222   223   206   209   241   281   299   260   211   158   145   134   117   107   100  93.1  85.1  76.4  71.9  68.4  68.0
 45.0   211   213   197   210   264   290   284   291   214   161   149   141   121   108  99.9  91.3  81.9  72.5  67.1  63.4  62.8
 47.5   199   201   188   212   272   271   260   317   200   164   155   147   125   108  99.5  89.9  79.6  68.8  62.7  59.3  59.1
 50.0   184   188   181   216   263   241   235   304   201   168   160   154   126   108  99.3  88.4  77.0  65.3  58.7  56.2  55.7
 52.5   169   173   172   217   242   217   224   250   203   176   166   157   123   109  99.5  87.1  74.7  62.2  55.3  55.3  55.7
 55.0   154   157   163   210   217   199   220   220   211   179   170   159   120   109   101  87.0  72.5  59.4  53.7  57.3  59.1
 57.5   139   139   154   193   193   187   214   221   228   177   166   150   117   107   101  86.8  70.2  56.7  52.7  57.6  60.3
 60.0   131   122   139   166   168   180   200   225   220   168   156   137   113   104   101  87.0  68.4  53.7  51.3  53.9  57.9
 62.5   136   115   116   138   158   180   181   218   232   160   151   130   106   100  98.2  86.4  67.4  51.6  49.1  51.3  57.9
 65.0   133   116  88.0   112   165   197   179   227   287   160   146   123  98.2  96.1  94.8  84.2  66.9  50.8  46.9  53.4  65.9
 67.5  81.9  81.3  68.8  90.4   166   203   198   290   337   155   140   115  90.8  91.6  89.5  79.1  64.8  50.7  45.7  61.4  83.7
 70.0  46.2  49.6  56.7  76.7   148   189   237   404   389   127   109  84.5  59.7  60.5  60.7  57.6  52.3  44.3  41.3  63.3  97.6
 72.5  33.6  35.7  46.7  64.8   126   180   311   495   419  74.0  57.1  38.9  24.8  34.9  35.9  29.4  25.9  25.6  29.6  53.4  90.5
 75.0  21.9  24.0  31.6  48.3  92.7   184   361   427   241  45.3  32.5  24.5  23.9  34.8  34.9  25.1  19.1  17.9  20.5  36.2  56.7
 77.5  10.8  12.1  16.9  25.4  44.9   175   265   182  95.0  30.8  21.7  17.6  20.3  26.0  25.6  18.0  12.5  10.5  12.3  19.9  25.6
 80.0   1.5   2.6   5.1   7.1  11.9  99.6  83.6  50.2  29.9  15.7  12.1  10.3  11.1  12.6  12.8   9.4   6.5   4.8   6.5   8.9  10.5
 82.5   0.0   0.8   0.8   1.9   2.3   8.9   9.9   9.9   7.4   5.7   5.1   4.5   4.3   4.5   4.6   3.5   2.6   1.4   2.9   3.9   4.3
 85.0   0.0   0.1   0.1   0.3   0.3   1.1   1.4   1.5   1.5   1.2   1.1   0.9   0.9   0.9   0.9   0.9   0.6   0.3   0.9   1.2   1.2
 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
 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