Type
Catalog number
FEATURES
OPTICAL
• Reflector – Self-flanged, specular clear or semi-diffuse
reflector. Optically designed for 45 degree cutoff to lamp
and lamp image. Minimum flange matches reflector
finish. White painted flange optional.
• Baffle/cone – Specular clear upper reflector. Microgroove
baffle with white painted flange or specular black cone
with flange that matches cone finish.
MECHANICAL
• 16-gauge galvanized steel mounting/plaster frame with
friction support springs to retain optical system.
Accommodates up to 7/8” thick ceiling standard. See
Accessories for increased ceiling thickness capability.
• Mounting bars are 16-gauge galvanized steel with
continuous 4” vertical adjustment, held in place with toolless, cam-action locking system. Post installation
adjustment possible without the use of tools from above or
below the ceiling. Shipped pre-installed.
• Galvanized steel junction box with bottom-hinged access
covers and spring latches. Two combination ½”-3/4” and
four ½” knockouts for straight-through conduit runs.
Capacity: 8 (4 in, 4 out) No. 12 AWG conductors rated for
90°C.
ELECTRICAL SYSTEM
• Die-cast aluminum lampholder housing. Designed for
effective heat dissipation and positive light center
positioning.
• Mogul-base porcelain socket with nickel-plated screw
shell.
• Prewired, encased-and-potted, 120/277V or 120/347V
ballast tray module. Module can be attached before or
after mounting of mounting/plaster frame.
• Thermally-activated insulation detector.
Listing
• Fixtures are UL Listed for thru-branch wiring, recessed
mounting and damp locations. Listed and labeled to
comply with Canadian Standards (see Options).
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HID Downlights
12" AH
Open Reflector
MH or HPS Lamp
19-1-4 (48.9)
Aperture:
11-3/4 (29.8)
Ceiling opening: 12-3/8 (31.4)
Overlap trim:
12-3/4 (32.4)
17-15/16 (45.5)
*Alzak is a registered trademark of ALCOA.
21-11/16 (55.1)
All dimensions are inches (centimeters).
ORDERING INFORMATION
Example: AH 175M 12AR 120
Choose the boldface catalog nomenclature that best suits your needs and write it on the
appropriate line. Order accessories as separate catalog numbers (shipped separately).
AH
Series
AH
Wattage/lamp
Metal Halide
(includes required safety
glass)
175M M175/C/BU/BD
250M M250/C/U
320M M320/C/U
High Pressure Sodium
70S LU70/MED
100S LU100/MED
150S LU150/55/MED
Reflector Type
12AR
12CR
Clear
Champagne
gold
12GR
Gold
12WTR Wheat
12UBR Umber
12PR
Pewter
Finish
(blank)
LD
Specular
low
iridescent
Semidiffuse
low
iridescent
120
277
347
Accessories
SC10
Options
Voltage
Order as separate catalog numbers.
Sloped ceiling adaptor. Degree of slope must be
specified (10D, 15D, 20D, 25D, 30D). Ex: SC12 10D.
CTA10 Ceiling thickness adaptor (extends mounting frame to
accommodate ceiling thickness up to 2").
WLP
TRW
LRC
QRS
EC
SF
With lamp (shipped separately).
White painted flange.
Provides compatibility with Lithonia Reloc System
820.
Quartz restrike system (uses maximum 150W DC
base quartz lamp by others).
Emergency circuit (DC socket with leads for connection to external emergency power source;
maximum150W lamp).
Single fuse.
QRSTD Quartz restrike system with time delay.
CSA
SCWA
CGL
Listed and labeled to comply with Canadian Standards.
Super CWA pulse start ballast
Safety glasses (with socket for enclosed metal
halide, 150W andbelow).
AH 12 OPEN
DHID-290
12" AH Open Reflector, Gotham Series
Distribution curve
Distribution data
Output data
Coefficient of utilization
Single luminaire data 30" above floor
AH 250M 12AR, 250W M250/C/U lamp, 0.9 s/mh, 20500 rated lumens, test no. 2189060602
90°
From 0°
Lumens
0° 15284
5° 15246 1437
15° 13522 3732
25° 9024 4123
35° 3955 2610
45° 913 858
55°
69
104
65°
22
23
75°
1
4
85°
0
0
90°
0
3100
6200
45°
9300
cp.
12400
15500
0°
Zone
Lumens %lamp
0°-30° 9292
0°-40° 11902
0°-60° 12864
0°-90° 12891
90°-180° 0
0°-180° 12891
45.33
58.06
62.75
62.88
0.0
62.88*
* Efficiency
ρf
20%
ρc
80%
50%
30%
ρw 50% 30% 50% 30% 10% 50%
1
2
3
4
5
6
7
8
9
10
70
67
63
60
57
54
51
49
46
44
69
65
61
57
54
51
48
46
43
41
67
63
61
58
55
53
50
48
45
43
66
62
59
56
53
50
47
45
42
40
64
62
59
57
54
52
49
47
45
43
64
61
58
55
52
50
47
45
42
40
Initial fc
Mount at beam
height center
8'
10'
12'
14'
16'
505.3
271.7
169.4
115.6
83.9
50%
10%
beam angle 46.6° beam angle 74.9°
fc at
fc at
Beam beam
Beam beam
diameter edge
diameter edge
4.7' 252.6
6.4' 135.9
8.2' 84.7
9.9' 57.8
11.6' 41.9
8.4'
11.5'
14.6'
17.6'
30.1'
50.5
27.2
16.9
11.6
8.4
AH 250S 12AR, 250W LU250/MED lamp, 0.9 s/mh, 26000 rated lumens, test no. 2192080602
90°
4000
8000
12000
16000
20000
0°
From 0°
cp.
Lumens
0° 19749
5° 18248 1744
15° 16658 4626
25° 13086 5932
45° 35° 6535 4232
45° 2053 1685
55° 100 203
65°
0
0
75°
0
0
85°
0
0
90°
0
Zone
Lumens %lamp
0°-30° 12302
0°-40° 16533
0°-60° 18421
0°-90° 18421
90°-180° 0
0°-180° 18421
* Efficiency
47.32
63.59
70.85
70.85
0.0
70.85*
ρf
20%
ρc
80%
50%
30%
ρw 50% 30% 50% 30% 10% 50%
1
2
3
4
5
6
7
8
9
10
79
75
70
67
63
60
56
53
50
47
78
72
67
63
59
56
52
49
46
43
78
73
69
66
62
59
56
52
49
47
76
71
67
63
59
55
52
49
46
43
75
71
68
64
61
58
55
52
49
46
74
69
65
62
58
55
51
48
45
43
Initial fc
Mount at beam
height center
8'
10'
12'
14'
16'
652.9
351.1
218.8
149.3
108.4
50%
10%
beam angle 49.5° beam angle 78.5°
fc at
fc at
Beam beam
Beam beam
diameter edge
diameter edge
5.1' 236.4
6.9' 175.5
8.8' 109.4
10.6' 74.7
12.5' 54.2
9.0'
12.3'
15.5'
18.8'
22.1'
65.3
35.1
21.9
14.9
10.8
Conversion Factor
ENCASED-AND-POTTED BALLAST ELECTRICAL CHARACTERISTICS
Maximum
line current
Ballast
120/277
Metal Halide (Power Factor 90%)
175W CWA
2.00/0.87
250W CWA
2.60/1.12
High Pressure Sodium (Power Factor 90%)
150W HX
2.55/1.17
250W CWA
2.60/1.12
Maximum
line current
120/347
Input
watts
1.90/0.65
2.50/0.85
205/208
290/285
2.55/0.90
2.50/0.85
185
290/285
Use multiplier to determine
candlepower, lumens and
footcandles of other finishes
and lamps.
CR = .95; GR = .90;
250M = 175M x .68
IMPORTANT: Plug-in insulated receptacles provided are polarized and marked 120 or
277. Fixture is shipped with ballast plugged into 277. For 120V operation, plug into
120 receptacle.
Tested to current IES and NEMA standards under stabilized laboratory conditions. Various operating factors can cause differences between laboratory data and
actual field measurements. Dimensions and specifications on this catalog sheet are based on the most current available data and are subject to change without
notice.
DHID-290
©2003 Gotham, Rev. 2003
DHID-290.p65