Illuminance plots

produced from photometry file gal4mrc.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] 45542
# [DATE] 5/22/74
# [MANUFAC] COOPER LIGHTING
# [LUMCAT] GAL40MXXRC
# [LUMINAIRE] 400W MH RECTANGULAR CUTOFF FLOODLIGHT
# [LAMP] 400W MH CL BT-37
# [_REFLECTOR] HYDROFORMED ALUMINUM
# [_REFRACTOR] CLEAR FLAT GLASS
# [_SOCKET POSITION] HORIZONTAL
# [_LAMP LUMENS] 30000
# TILT=NONE
# Bulbs: 1,  30000 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:  400 W


# Source file: gal4mrc.ies
# Luminaire flux = 15627 lm,
#                   52.1 % of the bulb flux
# between 75 and 90:  1.7 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  17.1 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   118 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   103 cd / 1000 lm,
# maximum spec. lum. intensity   573 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   182   182   182   182   182   182   182   182   182   182   182   182   182   182   182   182   182   182   182
  5.0   351   350   344   335   321   301   277   251   222   192   168   145   123   103  85.3  78.7  76.6  75.2  74.4
 10.0   507   502   487   466   438   406   370   325   266   205   151   100  77.2  70.1  64.4  60.2  57.0  55.5  55.4
 15.0   560   561   561   555   540   464   391   324   251   173   108  67.4  58.3  50.2  43.2  43.7  48.2  51.0  52.8
 20.0   544   554   540   519   480   448   391   319   244   139  70.7  49.6  39.2  33.3  39.6  46.5  54.0  59.7  61.2
 25.0   554   556   505   457   419   399   397   327   259   119  50.8  36.8  24.6  27.9  36.5  39.2  35.7  33.8  32.3
 30.0   563   547   458   405   371   347   347   316   255   105  38.8  27.1  18.8  18.1  21.1  19.0  12.4   8.8   7.5
 35.0   573   544   466   395   341   298   288   290   246  98.8  34.9  23.4  15.0  10.8   9.3   5.1   0.0   0.0   0.0
 40.0   414   416   441   431   319   259   227   200   154  85.3  29.9  21.1  12.0   8.0   5.2   0.0   0.0   0.0   0.0
 45.0   241   237   280   369   272   196   148   136   122  74.8  26.3  18.4   9.0   6.3   0.0   0.0   0.0   0.0   0.0
 50.0   184   185   176   213   177   138   118   107   103  66.3  23.2  14.9   7.5   4.9   0.0   0.0   0.0   0.0   0.0
 55.0   149   150   148   142   131   115  98.6  87.9  83.1  53.3  18.5  11.0   6.1   4.0   0.0   0.0   0.0   0.0   0.0
 60.0   129   129   130   126   114   101  88.1  74.4  64.3  36.8  13.9   8.1   5.2   0.0   0.0   0.0   0.0   0.0   0.0
 65.0   118   116   116   116   105  97.2  75.3  53.5  37.5  22.7  11.4   6.3   4.5   0.0   0.0   0.0   0.0   0.0   0.0
 70.0  89.0   103   103   101  93.9  64.6  52.2  37.6  22.3  13.8   8.8   4.9   3.9   0.0   0.0   0.0   0.0   0.0   0.0
 75.0  34.9  52.3  64.8  61.7  36.9  39.1  39.8  32.0  17.8   9.5   5.3   3.8   3.4   0.0   0.0   0.0   0.0   0.0   0.0
 80.0   0.0   7.3   7.7   7.2   9.9  15.7  17.1  11.5   7.5   5.2   3.8   3.1   3.0   0.0   0.0   0.0   0.0   0.0   0.0
 85.0   0.0   2.6   3.0   0.0   0.0   0.0   0.0   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