Illuminance plots

produced from photometry file ovf2s2d.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] 766641 
# [DATE] 5/18/93  
# [MANUFAC] COOPER LIGHTING
# [LUMCAT] OVF25SXX2D  
# [LUMINAIRE] 250 WATT HPS TYPE II ROADWAY  
# [LAMP] 250W HPS CL E-18  
# [_REFLECTOR] HYDROFORMED ALUMINUM  
# [_REFRACTOR] FLAT GLASS  
# [_SOCKET POSITION] TILTED UP SLIGHTLY FROM VERTICAL 
# [_LAMP LUMENS] 27500 
# TILT=NONE
# Bulbs: 1,  27500 lm each
# Number of measured angles:  31 vertical,  22 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: ovf2s2d.ies
# Luminaire flux = 21539 lm,
#                   78.3 % of the bulb flux
# between 75 and 90:  3.1 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  63.4 cd / 1000 lm ,  0.5 % 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   411 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   530 cd / 1000 lm,
# maximum spec. lum. intensity   530 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  80.0  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   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163   163
  5.0   180   180   179   177   176   173   173   169   167   166   165   164   162   160   158   155   154   153   153   151   151   151
 15.0   218   216   214   211   206   199   194   189   182   178   175   171   169   163   154   147   147   140   137   135   135   137
 25.0   201   199   204   199   200   199   196   184   172   166   163   161   161   171   172   164   152   135   126   121   117   117
 35.0   168   164   162   171   191   201   200   190   179   173   168   162   155   152   154   158   152   145   118   102  95.4  93.7
 45.0   157   154   152   153   154   165   186   210   235   256   246   235   242   233   196   171   133   115   103  77.5  71.1  64.8
 50.0   148   145   144   147   145   153   214   294   379   409   376   344   355   388   265   181   120  96.7  86.9  66.3  58.9  55.0
 55.0   119   119   124   132   131   150   252   393   464   462   440   399   401   379   227   151  98.4  81.1  66.6  56.8  45.7  44.3
 60.0  85.9  80.6  91.8   111   123   138   202   360   418   421   417   391   364   260   152   106  80.7  66.4  52.6  43.7  36.9  35.5
 62.5  71.0  68.0  78.2  98.9   113   129   183   353   411   411   400   361   314   193   129  97.6  75.2  61.9  49.0  38.3  31.4  29.6
 65.0  61.6  59.5  67.3  89.8   103   121   163   309   372   387   385   339   285   157   109  85.3  70.1  57.9  48.1  36.1  26.4  23.6
 67.5  53.6  52.1  60.1  77.6  92.5   111   135   261   362   392   414   376   327   140   103  81.9  68.3  54.3  50.5  36.6  21.4  18.1
 70.0  44.5  43.7  50.4  64.6  78.8  98.0   109   249   408   477   515   444   376  83.6  69.6  49.0  56.3  50.4  51.3  37.2  16.0  13.5
 72.5  38.7  34.5  37.7  47.2  52.4  70.3  74.0   289   505   530   508   430   291  70.0  32.4  18.8  17.4  21.2  32.4  26.1  12.4  11.7
 75.0  21.7  18.9  20.6  24.4  23.7  32.7  38.3   265   355   321   276   261   156  42.6  24.5  14.8  10.3   9.8  18.5  12.4   8.9  10.6
 77.5   7.6   6.5   6.6   6.8   7.0  11.7  20.0   111   180   124  93.0  88.1  66.3  23.8  16.0  10.0   6.7   6.0   7.8   6.2   4.9   6.5
 80.0   2.3   2.3   2.3   2.8   3.6   6.3   9.2  31.9  63.4  46.8  35.6  28.3  25.5  14.1   8.4   5.2   4.5   3.4   3.8   3.1   3.1   3.3
 82.5   1.2   1.2   1.2   1.4   1.6   3.0   3.8   9.7  18.5  15.6  13.0  11.1  10.7   6.7   3.7   2.2   2.3   1.6   1.9   1.4   1.7   1.6
 85.0   0.4   0.5   0.5   0.5   0.7   1.0   1.2   4.1   5.9   6.3   5.8   6.1   4.0   2.3   1.1   0.8   0.7   0.8   0.7   0.5   0.7   0.6
 87.5   0.1   0.1   0.0   0.0   0.1   0.0   0.0   0.8   1.5   1.2   1.9   1.3   0.5   0.1   0.0   0.1   0.1   0.1   0.1   0.0   0.1   0.1
 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
 95.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
105.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
115.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
125.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
135.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
145.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
155.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
165.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
175.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0
180.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0