
GOTHAM ARCHITECTURAL DOWNLIGHTING | 1400 Lester Road Conyers GA 30012 | P 800.315.4982 | gothamlighting.com
© 2009-2013 Acuity Brands Lighting, Inc. All Rights Reserved. Rev. 06/26/13. Specifications subject to change without notice.
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A-6-OPEN
A 6AR (100 A19)
(1) 100A LAMP, 1750 RATED LUMENS, 1.3 S/MH, TEST NO. LTL7258
A 6AR (150 A21)
(1) 150A LAMP, 2780 RATED LUMENS, 1.2 S/MH, TEST NO. LTL7257
A 6MB (150 A21)
(1) 150A LAMP, 2780 RATED LUMENS, 1.2 S/MH, TEST NO. LTL7636
A 6BC (150 A21)
(1) 150A LAMP, 2780 RATED LUMENS, 1.1 S/MH, TEST NO. LTL7638
PHOTOMETRY
Distribution Curve Distribution Data Output Data Coefficient of Utilization Illuminance: Single Luminaire 30” Above Floor
6” A
Open Reflector
A19, A21 Lamp
From 0° cp. Lumens
0° 1159 0
5° 1174 113
15° 1196 341
25° 1117 500
35° 617 381
45° 144 118
55° 23
65° 11
75° 00
85° 00
90° 00
ρf20%
ρc 80% 70% 50%
ρw 50% 30%50% 30% 50% 30%
1585757565554
2545153515149
3504749474846
4464346434542
5434043404239
6403740373936
7383437343734
8353235323432
9333033303229
Zone Lumens %lamp
0°-30° 954 34.3
0°-40° 1335 48.0
0°-60° 1455 52.3
0°-90° 1456 52.4
90°-180° 0 0.0
0°-180° 1456 52.4*
*Efficiency
50% 10%
beam angle 59.7° beam angle 83.7°
Initial fc fc at fc at
Mount at beam Beambeam Beam beam
height center diameter edge diameter edge
8' 38.3 6.3' 19.2 9.8' 3.8
10' 20.6 8.6'10.3 13.4' 2.1
12' 12.8 10.9' 6.4 17.0' 1.3
14'8.8 13.2' 4.4 20.5' 0.9
16'6.4 15.5' 3.2 24.1' 0.6
240
480
720
960
90
o
45
o
0
o
From 0° cp. Lumens
0° 15100
5° 1541 144
15° 1443 409
25° 1352 612
35° 886536
45° 211178
55° 69
65° 11
75° 00
85° 00
ρf 20%
ρc 80% 70% 50%
ρw50% 30%50% 30% 50% 30%
1757374727170
2696768666664
3646163606259
4605659555754
5555155515450
6524751475046
7484448444743
8454145404440
9423842384137
Zone Lumens %lamp
0°-30°116641.9
0°-40°170261.2
0°-60°188967.9
0°-90°189068.0
90°-180° 00.0
0°-180° 1890 68.0*
*Efficiency
50% 10%
beam angle 60.1° beam angle 84.6°
Initial fc fc at fc at
Mount at beam Beam beam Beam beam
height center diameter edge diameter edge
8' 49.9 6.4' 25.0 10.0' 5.0
10' 26.8 8.7' 13.4 13.6' 2.7
12' 16.7 11.0'8.4 17.3' 1.7
14' 11.4 13.3'5.7 20.9' 1.1
16' 8.315.6' 4.124.6' 0.8
320
640
960
1280
90
o
45
o
0
o
From 0° cp. Lumens
0° 801 0
5° 813 78
15° 830 236
25° 845 383
35° 599 364
45° 151 124
55° 12
65° 00
75° 00
85° 00
ρc80% 70% 50%
ρw 50% 30% 50%30% 50%30%
1757373727169
2696668656664
3646063606158
4595558555754
5555154505349
6514650464946
7474347434642
8444044394339
9413741374036
Zone Lumens %lamp
0°-30° 697 39.8
0°-40°1061 60.6
0°-60°1188 67.9
0°-90°1188 67.9
90°-180° 0 0.0
0°-180° 1188 67.9*
*Efficiency
50
0%
beam angle 65.7° beam angle 87.5°
Initial fc fc at fc at
Mount at beam Beambeam Beam beam
height center diameter edge diameter edge
8' 26.5 7.1' 13.2 10.5' 2.6
10' 14.2 9.7' 7.1 14.3' 1.4
12' 8.9 12.3' 4.4 18.1' 0.9
14' 6.1 14.9' 3.0 22.0' 0.6
16' 4.4 17.4' 2.2 25.8' 0.4
180
360
540
720
900
90
o
45
o
o
From 0° cp. Lumens
0° 1249 0
5° 1289 123
15° 1257 356
25° 1104 497
35° 622 384
45° 154 124
55° 11
65° 00
75° 00
85° 00
ρf 20%
ρc 80% 70% 50%
ρw 50% 30% 50%30% 50% 30%
1595858575655
2555354525250
3514850484947
4474447444643
5444144414340
6413841384037
7393538353735
8363336333532
9343134303330
Zone Lumens %lamp
0°-30° 975 35.1
0°-40°1359 48.9
0°-60°1485 53.4
0°-90°1485 53.4
90°-180° 0 0.0
0°-180° 1485 53.4*
*Efficiency
50% 10%
beam angle 57.7° beam angle 83.4°
Initial fc fc at fc at
Mount at beam Beam beam Beam beam
height center diameter edge diameter edge
8' 41.3 6.1' 20.6 9.8' 4.1
10'22.2 8.3' 11.1 13.3' 2.2
12'13.8 10.5'6.9 16.9
.4
14'9.4 12.7'4.7 20.4
.9
16'6.9 14.9'3.4 24.0
.7
0
o
260
520
780
1040
1300
90
o
45
o
PHOTOMETRY NOTES
• Tested to current IES and NEMA standards under stabilized laboratory conditions.
• Actual performance may differ as a result of end-user environment and application.
• Consult factory or IES file for microgroove baffle, black cone or other photometric reports.
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