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| 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. |
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.
# IESNA91
# [TEST] LTL11273
# [MANUFAC] AMERICAN ELECTRIC LIGHTING
# [LUMCAT] 11PKG 10S R5 FC
# [LUMINAIRE] 11 SERIES 100W HPS TYPE 5 FULL CUTOFF
# [LAMP] ONE 100-WATT CLEAR ET-23.5 HIGH PRESSURE SODIUM, VERTICAL BASE-UP
# [MORE] POSITION.
# [_INFOLINK] www.lithonia.com/visual/ies/ies.asp?vfile=
# TILT=NONE
# Bulbs: 1, 9500 lm each
# Number of measured angles: 37 vertical, 1 horizontal ones
# Photometric type: 1, Units type: 1
# Luminous opening diameter (and height?): 0.250 ( 0.000 )
# Ballast factor: 1, Input power: 131 W
# Source file: American_Electric_Lighting\Security\11\LTL11273.ies
# Luminaire flux = 7907 lm,
# 83.2 % of the bulb flux
# between 75 and 90: 3.1 % of the luminaire flux
# - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above: max 17.1 cd/1000lm , 0.5 % of the luminaire flux
# 90deg and above: max 0.0 cd/1000lm , 0.0 % of the luminaire flux
# CutOff Type: Full_CutOff
# 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 46.3
2.5 43.3
5.0 38.0
7.5 35.5
10.0 36.0
12.5 38.2
15.0 41.3
17.5 45.7
20.0 51.5
22.5 58.2
25.0 63.6
27.5 64.9
30.0 67.7
32.5 73.3
35.0 82.5
37.5 96.9
40.0 116.7
42.5 142.5
45.0 173.6
47.5 207.9
50.0 240.0
52.5 268.0
55.0 291.7
57.5 309.6
60.0 317.8
62.5 311.1
65.0 276.2
67.5 215.4
70.0 150.3
72.5 104.1
75.0 67.5
77.5 37.9
80.0 17.1
82.5 5.8
85.0 1.4
87.5 0.2
90.0 0.0
(A similar table including even some other results can be computed at producer's website.)