Illuminance plots of ge8881

(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] GE 8881
# [MANUFAC] GE Lighting Systems - Hendersonville  NC  USA
# [LUMCAT] (not specific to a single catalog number)
# [LUMINAIRE] GE DIMENSION (DMA)               
# [LAMP] MET 400 / MER 400             
# [OTHER] Distribution: HTV       
# [MORE] Socket Pos: 2                             
# [MORE] Comments: HORIZONTAL LAMP               -                             
# [MORE] Revision No:  0  Rev Date: 930412  Test Date: 91081905
# [MORE] Reflector: 440056-01                       Refractor: CLEAR FLAT GLASS              
# TILT=NONE
# Bulbs: 1,   1000 lm each
# Number of measured angles:  20 vertical,  36 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous opening diameter (and height?):   1.500  (   0.000 )
# Ballast factor: 1,  Input power:    1 W


# Source file: ies/ge8881.ies
# Luminaire flux =   830 lm,
#                   83.0 % of the bulb flux
# between 75 and 90:  1.1 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max  16.0 cd/1000lm ,  0.3 % 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   280 cd/1000lm,
# 67.5 deg to <72.5 deg:   max   202 cd/1000lm,
# maximum spec. lum. intensity   298 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  52.5  55.0  57.5  62.5  65.0  67.5  72.5  75.0  77.5  82.5  85.0  87.5  92.5  95.0  97.5 102.5 105.0 107.5 112.5 115.0 117.5 122.5 125.0 127.5 135.0 145.0 155.0 165.0 175.0 180.0
#V:  
  0.0   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183   183
  5.0   182   184   183   184   183   182   182   182   182   183   183   183   184   184   184   184   184   184   183   183   183   182   182   182   184   184   184   186   186   186   186   186   185   186   186   186
 15.0   191   189   184   180   177   176   178   178   179   181   182   183   184   185   186   187   188   188   190   190   191   193   194   194   196   196   196   195   195   194   190   190   192   196   198   199
 25.0   188   190   192   186   186   196   201   203   203   204   204   204   206   206   207   209   210   212   214   216   217   220   221   222   223   224   223   221   220   218   212   206   208   220   228   232
 35.0   181   180   168   170   190   218   230   234   242   256   264   270   284   290   292   296   298   298   298   298   296   292   290   287   281   278   274   266   262   256   236   214   196   197   192   190
 45.0   142   140   138   147   160   177   200   207   211   220   224   226   228   230   232   234   236   236   234   234   233   232   231   233   236   238   235   229   226   217   190   162   154   152   144   140
 55.0   100  94.0  94.0   106   124   162   164   165   168   174   177   182   193   198   202   210   214   214   214   214   211   205   202   196   182   176   173   166   163   160   149   132   129   134   142   146
 60.0   157   140   142   152   152   161   156   164   172   188   194   200   218   226   234   251   254   256   254   254   254   250   246   241   220   212   203   188   186   184   166   157   164   191   196   198
 62.5   186   163   166   176   166   160   158   166   174   196   209   222   246   254   261   276   277   278   274   276   278   280   275   270   244   233   222   205   199   193   175   170   181   220   223   224
 65.0   214   186   190   199   180   160   172   179   186   203   216   230   250   252   254   256   256   254   250   252   255   262   262   261   240   232   224   212   204   197   184   182   198   248   250   251
 67.5   164   142   146   154   141   126   192   194   196   190   192   194   202   200   198   193   192   190   188   189   190   196   198   200   194   192   189   186   184   182   146   144   154   190   191   192
 70.0   114  99.0   102   108   102  92.0   166   167   168   151   144   136   120   111   102  89.0  86.0  82.0  80.0  82.0  84.0  92.0   100   108   124   129   134   142   145   148   108   106   110   132   132   132
 72.5  64.0  56.0  58.0  63.0  64.0  58.0  87.0  84.0  81.0  56.0  49.0  42.0  36.0  34.0  33.0  31.0  30.0  30.0  30.0  30.0  31.0  34.0  35.0  36.0  40.0  43.0  46.0  60.0  71.0  82.0  70.0  68.0  66.0  74.0  74.0  74.0
 75.0  13.0  12.0  14.0  18.0  25.0  24.0  26.0  24.0  23.0  19.0  18.0  16.0  16.0  15.0  14.0  14.0  14.0  14.0  14.0  14.0  14.0  14.0  16.0  16.0  16.0  17.0  18.0  21.0  23.0  24.0  31.0  30.0  22.0  17.0  15.0  14.0
 77.5  10.0   9.0  11.0  14.0  19.0  18.0  10.0  10.0  10.0   9.0   8.0   8.0   8.0   8.0   8.0   7.0   8.0   8.0   8.0   8.0   8.0   8.0   8.0   8.0   8.0   8.0   8.0   9.0  10.0  10.0  24.0  23.0  17.0  12.0  12.0  12.0
 80.0   7.0   6.0   8.0  10.0  13.0  12.0   5.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   4.0   5.0  16.0  16.0  12.0   8.0   8.0   8.0
 82.5   4.0   4.0   4.0   6.0   7.0   6.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   2.0   8.0   8.0   6.0   4.0   4.0   4.0
 85.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0   0.0   1.0   2.0
 87.5   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   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   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0