Illuminance plots of prm4h2

(as computed by ies2tab from that IES photometry file)

spacing 5 plot single luminaire plot
In the left half of the left plot, specific illuminance by a continuous row of luminaires spaced 5 heights is shown (right half is for 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:

   
       
# REPORT # : LRL 1094-6D
# MANUFACTURE : ARCHITECTURAL AREA LIGHTING
# CATALOG # : PRM2-H2
# 24" DIA X 26" DEEP UNIT W/SEMISPECULAR TYPE II REFL & HAMMERTONE
# AUXILIARY REFL. 20" DIA X 3" DEEP CLEAR GLASS LENS
# HORIZONTAL LAMP.  TOTAL WATTS = 295
# LAMP TYPE :  1  -  250-W CLR MH
# LAMP LUMENS :  20500 
# TILT=NONE
# Bulbs: 1,  20500 lm each
#  (luminous intensites divided by 10.00 in the original ies file)
# Number of measured angles:  20 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:  295 W


# Source file: prm4h2.ies
# Luminaire flux =  1519 raw, for the given bulb(s) it would be 15193 lm,
#                   74.1 % of the bulb flux
# between 75 and 90:  2.1 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  15.6 cd/1000lm ,  0.4 % of the luminaire flux
# 90deg and above:  max   0.0 cd/1000lm ,  0.0 % of the luminaire flux
# CutOff Type: Full_CutOff    

# 62.5 deg to <67.5 deg:   max   622 cd/1000lm,
# 67.5 deg to <72.5 deg:   max   520 cd/1000lm,
# maximum spec. lum. intensity   622 cd/1000lm

# 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   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118   118
  5.0   126   126   126   126   125   125   124   123   121   120   120   119   118   117   116   115   114   113   113   112   112
 15.0   147   148   148   148   149   149   146   141   136   130   127   124   120   115   112   110   108   107   105   105   104
 25.0   161   163   166   166   162   155   148   141   137   127   123   120   115   111   107   103   102   102   103   103   103
 35.0   169   168   167   163   160   157   150   143   136   125   120   118   113   108   105   103   103   104   104   105   105
 45.0   162   161   160   169   174   177   194   205   210   168   147   138   120   111   107   105   101  99.0  98.0  94.6  93.2
 55.0   111   114   121   152   195   250   364   457   530   394   326   275   173   148   133   128   114   100  85.4  81.5  79.5
 60.0  74.6  80.5  92.2   141   200   266   378   479   567   435   369   299   158   134   121   120   108  94.1  78.0  68.8  63.9
 62.5  64.9  70.2  81.5   132   186   243   380   497   595   433   352   283   144   126   116   114   104  91.2  73.2  62.9  58.0
 65.0  55.1  60.5  70.7   122   172   221   382   516   622   431   335   267   131   118   110   108   101  87.8  68.3  57.1  51.7
 67.5  48.3  53.2  63.4   106   144   177   309   423   520   351   266   219   123   113   105   100  95.1  83.4  64.9  52.7  46.3
 70.0  41.5  46.3  55.6  90.2   116   133   236   330   416   270   198   170   116   108   100  92.7  89.3  78.5  61.0  47.8  41.0
 72.5  32.7  36.6  43.9  67.3  83.9  93.2   162   215   251   159   112  96.6  64.9  62.0  58.5  55.1  57.1  55.6  50.2  38.0  32.2
 75.0  23.9  26.3  31.7  44.4  51.7  53.2  89.3   100  85.9  46.3  26.8  22.4  13.7  16.1  17.6  17.1  24.9  32.2  39.5  28.3  22.9
 77.5  14.1  15.1  18.0  24.4  28.3  29.3  48.3  54.6  48.3  27.3  17.1  14.6   9.3  10.7  11.7  11.7  16.6  22.0  27.8  19.5  15.1
 80.0   3.9   3.9   3.9   4.4   4.4   4.9   6.8   8.8  10.7   8.3   7.3   6.3   4.9   5.4   5.9   6.3   8.3  11.2  15.6  10.2   7.3
 82.5   3.4   3.4   3.4   3.4   3.4   3.9   4.9   5.9   6.8   5.4   4.9   4.4   3.9   3.9   4.4   4.4   5.4   6.8   9.3   6.3   4.9
 85.0   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4   2.4
 87.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5   1.5
 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