Illuminance plots

produced from photometry file gfx4mar.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] 768832
# [DATE] 12/03/01
# [MANUFAC] COOPER LIGHTING  
# [LUMCAT] GFX40MXXAR
# [LUMINAIRE] MEDIUM GALLERIA AREA ROUND
# [LAMP] 400 WATT MH CLEAR BT-37
# [_REFLECTOR ] PREM SPUN AREA ROUND
# [_REFRACTOR] FLAT GLASS
# [_SOCKETPOS] FIXED VERTICAL
# [_LAMPLUMENS] 36000
# TILT=NONE
# Bulbs: 1,  36000 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: gfx4mar.ies
# Luminaire flux = 25489 lm,
#                   70.8 % of the bulb flux
# between 75 and 90:  0.7 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   3.4 cd / 1000 lm ,  0.1 % 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   309 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max   154 cd / 1000 lm,
# maximum spec. lum. intensity   335 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  50.3
  2.5  50.5
  5.0  50.6
  7.5  51.7
 10.0  54.5
 12.5  59.3
 15.0  63.6
 17.5  69.0
 20.0  75.6
 22.5  84.1
 25.0  92.4
 27.5  99.6
 30.0   105
 32.5   109
 35.0   111
 37.5   111
 40.0   114
 42.5   120
 45.0   127
 47.5   136
 50.0   154
 52.5   200
 55.0   258
 57.5   306
 60.0   335
 62.5   309
 65.0   243
 67.5   154
 70.0  63.8
 72.5  24.6
 75.0  13.2
 77.5   7.2
 80.0   3.4
 82.5   1.6
 85.0   0.2
 87.5   0.0
 90.0   0.0