Illuminance plots of ja540

(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:

   
       
# IESNA91
# [TEST] LSI 4941
# [DATE] 09/25/85
# [MANUFAC] RUUD LIGHTING
# [LUMCAT] JA540
# [LUMINAIRE] 20.5" DIAMETER PARKING/ROADWAY TYPE III
# [LAMP] 400 WATT HPS
# TILT=NONE
# Bulbs: 1,  50000 lm each
# Number of measured angles:  20 vertical,  22 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous openig width, length and height:   1.160   0.830   0.000
# Ballast factor: 1,  Input power:  465 W


# Source file: ja540.ies
# Luminaire flux = 35248 lm,
#                   70.5 % of the bulb flux
# between 75 and 90:  3.2 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  50.1 cd/1000lm ,  0.5 % 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   230 cd/1000lm,
# 67.5 deg to <72.5 deg:   max   306 cd/1000lm,
# maximum spec. lum. intensity   365 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  67.5  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   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155
  5.0   165   164   164   165   164   163   161   160   160   159   157   155   155   153   152   149   148   146   146   144   144   146
 10.0   174   172   173   171   171   170   168   167   166   165   162   160   159   156   153   148   144   140   135   133   132   134
 15.0   180   180   178   179   178   173   170   167   167   164   160   159   158   154   151   147   142   137   130   124   121   122
 20.0   177   179   176   178   176   174   168   165   164   164   162   160   159   156   152   144   140   132   124   115   110   111
 25.0   161   166   167   170   172   171   171   167   168   166   165   163   161   155   149   142   135   127   118   107   100   100
 30.0   141   145   152   161   167   171   175   170   171   166   164   161   159   154   147   138   129   121   114   103  94.8  93.3
 35.0   119   124   138   153   164   172   177   177   175   173   170   168   166   161   152   141   130   120   114   102  92.5  90.2
 40.0   104   110   128   144   159   182   207   221   223   215   198   191   186   179   168   152   136   125   114   105  92.5  90.2
 45.0  91.7  98.2   116   138   159   209   267   292   289   265   229   219   214   211   194   168   143   125   111   102  91.0  89.4
 50.0  76.6  85.3   166   125   157   234   315   352   350   314   270   254   244   237   212   174   144   119   102  91.4  80.4  78.9
 52.5  68.3  78.1   100   116   154   233   309   363   365   331   281   263   249   230   215   180   147   115  98.2  85.7  74.3  72.9
 55.0  61.5  70.9  92.5   106   143   216   285   355   355   326   267   234   211   204   212   190   153   114  92.9  80.0  67.6  66.0
 60.0  58.4  62.6  77.7  86.8   109   157   215   224   213   191   166   165   174   198   212   203   166   118  86.1  69.0  53.5  48.6
 65.0  62.9  66.7  71.3  76.6  92.5   118   167   218   230   214   161   149   150   176   176   164   144   100  70.9  54.6  39.8  35.0
 70.0  36.4  50.5  48.5  60.3  69.7   103   189   285   306   275   184   149   131   139   134   118  97.8  60.7  46.3  34.1  23.2  20.5
 75.0   5.4   8.3   9.5  19.8  23.5  65.2   151   229   217   186  89.9  59.6  41.3  47.1  67.9  61.1  44.0  19.0  14.5   9.1   5.3   5.4
 80.0   0.8   1.4   1.4   1.9   1.4   5.7  19.7  45.8  50.1  49.3  26.6  17.8  11.0  11.7  15.9  12.5   5.7   2.7   3.1   1.9   1.4   1.4
 85.0   0.0   0.4   0.0   0.4   0.0   0.0   0.4   0.0   0.0   0.4   0.0   0.4   0.0   0.4   0.8   0.8   0.4   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   0.0

# IESNA91
# [TEST] LSI 4941
# [DATE] 09/25/85
# [MANUFAC] RUUD LIGHTING
# [LUMCAT] JA540
# [LUMINAIRE] 20.5" DIAMETER PARKING/ROADWAY TYPE III
# [LAMP] 400 WATT HPS
# TILT=NONE
# Bulbs: 1,  50000 lm each
# Number of measured angles:  20 vertical,  22 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous openig width, length and height:   1.160   0.830   0.000
# Ballast factor: 1,  Input power:  465 W


# Source file: ja540.ies
# Luminaire flux = 35248 lm,
#                   70.5 % of the bulb flux
# between 75 and 90:  3.2 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  50.1 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   230 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   306 cd / 1000 lm,
# maximum spec. lum. intensity   365 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  67.5  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   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155   155
  5.0   165   164   164   165   164   163   161   160   160   159   157   155   155   153   152   149   148   146   146   144   144   146
 10.0   174   172   173   171   171   170   168   167   166   165   162   160   159   156   153   148   144   140   135   133   132   134
 15.0   180   180   178   179   178   173   170   167   167   164   160   159   158   154   151   147   142   137   130   124   121   122
 20.0   177   179   176   178   176   174   168   165   164   164   162   160   159   156   152   144   140   132   124   115   110   111
 25.0   161   166   167   170   172   171   171   167   168   166   165   163   161   155   149   142   135   127   118   107   100   100
 30.0   141   145   152   161   167   171   175   170   171   166   164   161   159   154   147   138   129   121   114   103  94.8  93.3
 35.0   119   124   138   153   164   172   177   177   175   173   170   168   166   161   152   141   130   120   114   102  92.5  90.2
 40.0   104   110   128   144   159   182   207   221   223   215   198   191   186   179   168   152   136   125   114   105  92.5  90.2
 45.0  91.7  98.2   116   138   159   209   267   292   289   265   229   219   214   211   194   168   143   125   111   102  91.0  89.4
 50.0  76.6  85.3   166   125   157   234   315   352   350   314   270   254   244   237   212   174   144   119   102  91.4  80.4  78.9
 52.5  68.3  78.1   100   116   154   233   309   363   365   331   281   263   249   230   215   180   147   115  98.2  85.7  74.3  72.9
 55.0  61.5  70.9  92.5   106   143   216   285   355   355   326   267   234   211   204   212   190   153   114  92.9  80.0  67.6  66.0
 60.0  58.4  62.6  77.7  86.8   109   157   215   224   213   191   166   165   174   198   212   203   166   118  86.1  69.0  53.5  48.6
 65.0  62.9  66.7  71.3  76.6  92.5   118   167   218   230   214   161   149   150   176   176   164   144   100  70.9  54.6  39.8  35.0
 70.0  36.4  50.5  48.5  60.3  69.7   103   189   285   306   275   184   149   131   139   134   118  97.8  60.7  46.3  34.1  23.2  20.5
 75.0   5.4   8.3   9.5  19.8  23.5  65.2   151   229   217   186  89.9  59.6  41.3  47.1  67.9  61.1  44.0  19.0  14.5   9.1   5.3   5.4
 80.0   0.8   1.4   1.4   1.9   1.4   5.7  19.7  45.8  50.1  49.3  26.6  17.8  11.0  11.7  15.9  12.5   5.7   2.7   3.1   1.9   1.4   1.4
 85.0   0.0   0.4   0.0   0.4   0.0   0.0   0.4   0.0   0.0   0.4   0.0   0.4   0.0   0.4   0.8   0.8   0.4   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   0.0