Illuminance plots

produced from photometry file gfx4sar.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] 768841
# [DATE] 12/05/01
# [MANUFAC] COOPER LIGHTING  
# [LUMCAT] GFX40SXXAR
# [LUMINAIRE] MEDIUM GALLERIA AREA ROUND
# [LAMP] 400 WATT HPS CLEAR E-18
# [_REFLECTOR] PREMIUM SPUN AREA ROUND
# [_REFRACTOR] FLAT GLASS
# [_SOCKETPOS] FIXED VERTICAL LAMP
# [_LAMPLUMENS] 50000
# TILT=NONE
# Bulbs: 1,  50000 lm each
# Number of measured angles:  37 vertical,   1 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: gfx4sar.ies
# Luminaire flux = 36403 lm,
#                   72.8 % of the bulb flux
# between 75 and 90:  1.3 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   4.3 cd / 1000 lm ,  0.2 % 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   234 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   158 cd / 1000 lm,
# maximum spec. lum. intensity   284 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  46.3
  2.5  45.8
  5.0  45.3
  7.5  47.8
 10.0  53.7
 12.5  60.6
 15.0  67.8
 17.5  75.2
 20.0  82.5
 22.5  90.4
 25.0  97.0
 27.5   103
 30.0   107
 32.5   109
 35.0   111
 37.5   111
 40.0   114
 42.5   122
 45.0   145
 47.5   180
 50.0   206
 52.5   226
 55.0   268
 57.5   284
 60.0   267
 62.5   234
 65.0   198
 67.5   158
 70.0   117
 72.5  79.2
 75.0  36.5
 77.5  10.0
 80.0   4.3
 82.5   2.0
 85.0   0.8
 87.5   0.0
 90.0   0.0