Illuminance plots

produced from photometry file gal9mrc.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] 45802
# [DATE] 5/22/74
# [MANUFAC] COOPER LIGHTING
# [LUMCAT] GAL91MXXRC
# [LUMINAIRE] 1000W MH RECTANGULAR CUTOFF FLOODLIGHT
# [LAMP] 1000W HM CL BT-56
# [_REFLECTOR] HYDROFORMED ALUMINUM
# [_REFRACTOR] CLEAR FLAT GLASS
# [_SOCKET POSITION] HORIZONTAL
# [_LAMP LUMENS] 90000
# TILT=NONE
# Bulbs: 1,  90000 lm each
# Number of measured angles:  19 vertical,  19 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: 1000 W


# Source file: gal9mrc.ies
# Luminaire flux = 48966 lm,
#                   54.4 % of the bulb flux
# between 75 and 90:  1.5 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  14.9 cd / 1000 lm ,  0.3 % 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   131 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   105 cd / 1000 lm,
# maximum spec. lum. intensity   672 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  10.0  20.0  30.0  40.0  50.0  60.0  70.0  80.0  90.0 100.0 110.0 120.0 130.0 140.0 150.0 160.0 170.0 180.0
#V:  
  0.0   194   194   194   194   194   194   194   194   194   194   194   194   194   194   194   194   194   194   194
  5.0   276   274   269   261   251   242   231   219   206   192   174   157   140   126   113   108   106   105   105
 10.0   394   390   380   363   341   314   282   249   219   187   149   113  94.8  87.3  81.1  76.6  72.6  70.6  70.7
 15.0   502   496   481   462   434   395   348   292   236   179   119  81.1  70.2  60.3  51.3  49.7  52.0  53.2  54.6
 20.0   604   592   571   541   506   471   403   324   246   170  84.8  60.5  49.0  40.2  40.7  42.7  45.9  48.9  50.8
 25.0   658   648   630   593   532   472   413   317   232   152  57.1  44.8  33.4  32.9  33.0  34.3  36.8  39.2  40.3
 30.0   652   653   672   612   515   412   345   276   198   132  47.8  34.3  26.9  25.8  25.0  25.3  27.7  29.2  29.8
 35.0   554   543   537   538   450   332   263   217   160   118  41.8  27.8  22.2  19.3  16.8  16.4   0.0   0.0   0.0
 40.0   390   390   383   362   329   244   188   158   128   109  37.6  24.6  19.5  14.8  10.9   0.0   0.0   0.0   0.0
 45.0   236   229   247   237   213   178   145   130   116   103  33.7  22.4  17.1  11.8   0.0   0.0   0.0   0.0   0.0
 50.0   188   185   176   174   160   147   131   117   106  94.7  28.2  19.1  14.4   9.1   0.0   0.0   0.0   0.0   0.0
 55.0   151   150   151   148   140   135   124   109  97.2  83.8  21.5  14.4  11.0   6.3   0.0   0.0   0.0   0.0   0.0
 60.0   122   124   133   135   132   132   120   100  83.8  68.6  16.4  10.1   7.6   0.0   0.0   0.0   0.0   0.0   0.0
 65.0   109   108   118   127   131   123   102  76.0  49.1  28.6  12.3   7.3   5.5   0.0   0.0   0.0   0.0   0.0   0.0
 70.0  80.2  95.5   101   105  98.8  78.7  71.6  58.8  37.6  18.7   8.4   5.3   4.2   0.0   0.0   0.0   0.0   0.0   0.0
 75.0  27.1  49.2  47.5  46.6  35.7  42.0  40.5  31.4  20.6  11.3   5.8   4.0   3.2   0.0   0.0   0.0   0.0   0.0   0.0
 80.0   0.0   7.5   8.1   8.2  10.1  14.2  14.9  13.7   9.8   6.6   3.8   2.9   2.4   0.0   0.0   0.0   0.0   0.0   0.0
 85.0   0.0   1.3   2.8   0.0   0.0   0.0   0.0   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