Illuminance plots

produced from photometry file gfx9mar.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] 768805
# [DATE] 11/08/01
# [MANUFAC] COOPER LIGHTING  
# [LUMCAT] GFX91MXXAR
# [LUMINAIRE] MED GALLERIA AREA ROUND
# [LAMP] 1000 WATT MH CLEAR BT-37
# [_OTHER] FLAT GLASS
# [_OTHER] FIXED BASE UP
# [_OTHER] 110000
# TILT=NONE
# Bulbs: 1, 110000 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: 1000 W


# Source file: gfx9mar.ies
# Luminaire flux = 79515 lm,
#                   72.3 % of the bulb flux
# between 75 and 90:  2.2 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   7.5 cd / 1000 lm ,  0.3 % 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   228 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   162 cd / 1000 lm,
# maximum spec. lum. intensity   261 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  63.9
  2.5  61.8
  5.0  61.4
  7.5  62.6
 10.0  65.6
 12.5  70.0
 15.0  75.0
 17.5  82.5
 20.0  90.9
 22.5  99.0
 25.0   106
 27.5   112
 30.0   116
 32.5   119
 35.0   121
 37.5   121
 40.0   124
 42.5   130
 45.0   139
 47.5   154
 50.0   179
 52.5   200
 55.0   231
 57.5   261
 60.0   253
 62.5   228
 65.0   196
 67.5   162
 70.0   126
 72.5  88.6
 75.0  53.1
 77.5  21.6
 80.0   7.5
 82.5   3.3
 85.0   1.4
 87.5   0.3
 90.0   0.0