Illuminance plots of rt15f

(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 8411
# [DATE] 04/05/89
# [MANUFAC] RUUD LIGHTING
# [LUMCAT] RT15F
# [LUMINAIRE] FRESNEL WITHOUT REFLECTOR
# [LAMP] 13W FL
# TILT=NONE
# Bulbs: 1,    900 lm each
# Number of measured angles:  19 vertical,   1 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous openig width, length and height:   0.420   0.420   0.000
# Ballast factor: 1,  Input power:   18 W


# Source file: rt15f.ies
# Luminaire flux =   203 lm,
#                   22.5 % of the bulb flux
# between 75 and 90:  3.7 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   8.9 cd/1000lm ,  1.1 % 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    23 cd/1000lm,
# 67.5 deg to <72.5 deg:   max    19 cd/1000lm,
# maximum spec. lum. intensity    91 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  91.1
  5.0  90.0
 10.0  90.0
 15.0  90.0
 20.0  87.8
 25.0  83.3
 30.0  75.6
 35.0  66.7
 40.0  57.8
 45.0  50.0
 50.0  43.3
 55.0  36.7
 60.0  30.0
 65.0  23.3
 70.0  18.9
 75.0  13.3
 80.0   8.9
 85.0   6.7
 90.0   0.0

# IESNA91
# [TEST] LSI 8411
# [DATE] 04/05/89
# [MANUFAC] RUUD LIGHTING
# [LUMCAT] RT15F
# [LUMINAIRE] FRESNEL WITHOUT REFLECTOR
# [LAMP] 13W FL
# TILT=NONE
# Bulbs: 1,    900 lm each
# Number of measured angles:  19 vertical,   1 horizontal ones
# Photometric type: 1,  Units type: 1
# Luminous openig width, length and height:   0.420   0.420   0.000
# Ballast factor: 1,  Input power:   18 W


# Source file: rt15f.ies
# Luminaire flux =   203 lm,
#                   22.5 % of the bulb flux
# between 75 and 90:  3.7 % of the luminaire flux
#  - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above:  max   8.9 cd / 1000 lm ,  1.1 % 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    23 cd / 1000 lm,
# 67.5 deg to < 76  deg:   max    19 cd / 1000 lm,
# maximum spec. lum. intensity    91 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  91.1
  5.0  90.0
 10.0  90.0
 15.0  90.0
 20.0  87.8
 25.0  83.3
 30.0  75.6
 35.0  66.7
 40.0  57.8
 45.0  50.0
 50.0  43.3
 55.0  36.7
 60.0  30.0
 65.0  23.3
 70.0  18.9
 75.0  13.3
 80.0   8.9
 85.0   6.7
 90.0   0.0