Illuminance plots of za525

(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] LSI 14948
# [DATE] 12/14/00
# [MANUFAC] RUUD LIGHTING
# [LUMCAT] ZA525                                                                        
# [LUMINAIRE]16" DIFFUSE SPUN ALUMINUM EZ-BAY NO LENS                                
# [LAMP] 250W HPS                   
#                                          
# TILT=NONE
# Bulbs: 1,  28000 lm each
# Number of measured angles:  37 vertical,   1 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous opening diameter (and height?):   1.380  (   0.000 )
# Ballast factor: 1,  Input power:  250 W


# Source file: za525.ies
# Luminaire flux = 22298 lm,
#                   79.6 % of the bulb flux
# between 75 and 90:  0.5 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   3.0 cd/1000lm ,  0.1 % 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    68 cd/1000lm,
# 67.5 deg to <72.5 deg:   max    32 cd/1000lm,
# maximum spec. lum. intensity   312 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   162
  2.5   158
  5.0   150
  7.5   144
 10.0   146
 12.5   154
 15.0   168
 17.5   184
 20.0   199
 22.5   211
 25.0   223
 27.5   235
 30.0   248
 32.5   263
 35.0   279
 37.5   294
 40.0   306
 42.5   312
 45.0   310
 47.5   299
 50.0   269
 52.5   226
 55.0   177
 57.5   131
 60.0  93.5
 62.5  67.9
 65.0  47.1
 67.5  32.3
 70.0  21.3
 72.5  13.5
 75.0   8.5
 77.5   5.1
 80.0   3.0
 82.5   1.6
 85.0   0.7
 87.5   0.1
 90.0   0.0

# IESNA91
# [TEST] LSI 14948
# [DATE] 12/14/00
# [MANUFAC] RUUD LIGHTING
# [LUMCAT] ZA525                                                                        
# [LUMINAIRE]16" DIFFUSE SPUN ALUMINUM EZ-BAY NO LENS                                
# [LAMP] 250W HPS                   
#                                          
# TILT=NONE
# Bulbs: 1,  28000 lm each
# Number of measured angles:  37 vertical,   1 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous opening diameter (and height?):   1.380  (   0.000 )
# Ballast factor: 1,  Input power:  250 W


# Source file: za525.ies
# Luminaire flux = 22298 lm,
#                   79.6 % of the bulb flux
# between 75 and 90:  0.5 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   3.0 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    68 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max    32 cd / 1000 lm,
# maximum spec. lum. intensity   312 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   162
  2.5   158
  5.0   150
  7.5   144
 10.0   146
 12.5   154
 15.0   168
 17.5   184
 20.0   199
 22.5   211
 25.0   223
 27.5   235
 30.0   248
 32.5   263
 35.0   279
 37.5   294
 40.0   306
 42.5   312
 45.0   310
 47.5   299
 50.0   269
 52.5   226
 55.0   177
 57.5   131
 60.0  93.5
 62.5  67.9
 65.0  47.1
 67.5  32.3
 70.0  21.3
 72.5  13.5
 75.0   8.5
 77.5   5.1
 80.0   3.0
 82.5   1.6
 85.0   0.7
 87.5   0.1
 90.0   0.0