Illuminance plots of ge6841

(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 6841
# [MANUFAC] GE Lighting Systems - Hendersonville  NC  USA
# [LUMCAT] (not specific to a single catalog number)
# [LUMINAIRE] GE FILTRGARD                     
# [LAMP] MER 175DX                     
# [OTHER] Distribution: SC 1.1    
# [MORE] Socket Pos: FIXED                         
# [MORE] Comments: EN IND REFL N-GD              -                             
# [MORE] Revision No:  1  Rev Date: 790927  Test Date:        0
# [MORE] Reflector: -                               Refractor: -                             
# TILT=NONE
# Bulbs: 1,  10000 lm each
# Number of measured angles:  37 vertical,   1 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous opening diameter (and height?):   1.500  (   0.000 )
# Ballast factor: 1,  Input power:    0 W


# Source file: ies/ge6841.ies
# Luminaire flux =  6800 lm,
#                   68.0 % of the bulb flux
# between 75 and 90:  0.0 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   0.0 cd/1000lm ,  0.0 % 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     4 cd/1000lm,
# 67.5 deg to <72.5 deg:   max     2 cd/1000lm,
# maximum spec. lum. intensity   485 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):

  0.0   455
  5.0   449
 10.0   466
 15.0   485
 20.0   484
 25.0   427
 30.0   361
 35.0   289
 40.0   202
 45.0   125
 50.0  63.0
 55.0  23.0
 60.0   8.0
 65.0   4.0
 70.0   2.0
 75.0   0.0
 80.0   0.0
 85.0   0.0
 90.0   0.0
 95.0   0.0
100.0   0.0
105.0   0.0
110.0   0.0
115.0   0.0
120.0   0.0
125.0   0.0
130.0   0.0
135.0   0.0
140.0   0.0
145.0   0.0
150.0   0.0
155.0   0.0
160.0   0.0
165.0   0.0
170.0   0.0
175.0   0.0
180.0   0.0