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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] GE 1578
# [MANUFAC] GE Lighting Systems - Hendersonville NC USA
# [LUMCAT] (not specific to a single catalog number)
# [LUMINAIRE] GE SPECIAL
# [LAMP] -
# [OTHER] Distribution: COSINE
# [MORE] Socket Pos: -
# [MORE] Comments: SYMMETRICAL -
# [MORE] Revision No: 0 Rev Date: 871020 Test Date: 99999999
# [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/ge1578.ies
# Luminaire flux = 9994 lm,
# 99.9 % of the bulb flux
# between 75 and 90: 6.7 % of the luminaire flux
# - this part causes just GLARE in case of road lighting and similar purposes
# 80deg and above: max 55.0 cd/1000lm , 3.0 % 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 135 cd/1000lm,
# 67.5 deg to <72.5 deg: max 109 cd/1000lm,
# maximum spec. lum. intensity 318 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):
0.0 318
5.0 317
10.0 313
15.0 307
20.0 299
25.0 288
30.0 276
35.0 261
40.0 244
45.0 225
50.0 205
55.0 183
60.0 159
65.0 135
70.0 109
75.0 82.0
80.0 55.0
85.0 28.0
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