Illuminance plots

produced from photometry file egl91s33.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] 763051
# [DATE] 2/10/84 
# [MANUFAC] COOPER LIGHTING
# [LUMCAT] EGL91SXX33
# [LUMINAIRE] 1000W HPS 3H X 3V FLOOD
# [LAMP] 1000W HPS CL E-25
# [_REFLECTOR] SPUN ALUMINUM
# [_REFRACTOR] CLEAR FLAT GLASS
# [_SOCKET POSITION] AXIAL
# [_LAMP LUMENS] 140000
# TILT=NONE
# Bulbs: 1, 140000 lm each
# Number of measured angles:  46 vertical,   1 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous opening diameter (and height?):   1.830  (   1.750 )
# Ballast factor: 1,  Input power: 1000 W


# Source file: egl91s33.ies
# Luminaire flux = 70329 lm,
#                   50.2 % 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   4.2 cd / 1000 lm ,  0.6 % 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    28 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max    18 cd / 1000 lm,
# maximum spec. lum. intensity  2112 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):

  0.0  2035
  2.0  2112
  4.0  1991
  6.0  1458
  8.0  1073
 10.0   845
 12.0   558
 14.0   463
 16.0   391
 18.0   323
 20.0   257
 22.0   198
 24.0   158
 26.0   132
 28.0   117
 30.0   105
 32.0  92.9
 34.0  82.4
 36.0  74.8
 38.0  72.8
 40.0  73.1
 42.0  72.3
 44.0  70.3
 46.0  67.9
 48.0  63.5
 50.0  57.9
 52.0  51.7
 54.0  47.7
 56.0  43.8
 58.0  39.8
 60.0  35.8
 62.0  32.3
 64.0  27.9
 66.0  23.2
 68.0  18.4
 70.0  14.0
 72.0   9.9
 74.0   6.0
 76.0   4.4
 78.0   4.3
 80.0   4.2
 82.0   4.1
 84.0   4.0
 86.0   4.0
 88.0   4.0
 90.0   0.0