FEATURES
Type
OPTICAL SYSTEM
• Self-flanged, semi-specular, or matte-diffuse anodized lower
reflector. Optically designed to provide 40o cutoff for optimal
efficiency and glare control.
• Interchangeable upper reflectors provide narrow, medium
and wide distributions. These preset distribution patterns
allow designers to achieve various design objectives.
• 1/8" thick softening lens eliminates beam striations and
ensures maximum efficiency. Provides required protective
shielding.
• Optical system retained by self-aligning torsion support
springs.
Catalog number
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HID Downlights
6" ATH
T4/T6 Downlight
Ceramic Metal Halide Lamp
MECHANICAL SYSTEM
• Black painted housing features tool-less top access and
accommodates a maximum 1-1/2" ceiling thickness.
• Tool-less re-lamp capability from above or below ceiling.
• 16-gauge galvanized steel mounting bars with continuous 4”
vertical adjustment are shipped pre-installed. Post
installation adjustment possible without the use of tools from
above or below ceiling.
• Galvanized steel junction box with hinged access covers and
spring latch. Three combination 1/2"-3/4" and two1/2"
knockouts for straight-through conduit runs. Capacity: 8 (4 in,
4 out) No. 12 AWG conductors rated for 90°C.
• Secondary housing adjustment system for precise, final
ceiling to flange alignment.
15-9/16
9/1
156
(39.5)
15-3/16
3/1
156
(38.6)
ELECTRICAL SYSTEM
• Tool-less access door provides access to junction box and
ballast through the aperture.
• G12 (T6), G8.5 (T4) or PGJ5 (T4T) base ceramic socket.
• Pre-wired, electronic, 120 or 277V ballast module is standard.
Assembly can be attached before or after mounting of
mounting/plaster frame.
• Thermally activated insulation detector.
Aperture:
Ceiling Opening:
Overlap Trim:
6-1/4 (15.9)
6-7/8 (17.5)
7-1/2 (19.1)
9-13/16
13/
(24.9)
916
• 3000°K lamp ships standards.
LISTING
• Fixtures are UL Listed for thru-branch wiring, Non-IC recessed
mounting and damp locations. Listed and labeled to comply
with Canadian Standards.
All dimensions
are inches
(centimeters).
ORDERING INFORMATION
Example: ATH T6 39MHC 6AR N LD 120
Choose the boldface catalog nomenclature that best suits your needs and write it on the appropriate line.
ATH
Series Lamp Type Lamp Wattage Aperture/Trim Color
ATH
T4T 1,2
T42,3
T6 4
20MHC
39MHC
70MHC
150MHC
6AR
6BR 5
6PR
6UBR
6WTR
Clear
Black
Pewter
Umber
Wheat
Finish
Voltage
Ballast
(blank) Semispecular
LD Mattediffuse
120
277
347 6
(blank) Electronic
ballast
EMB Electromagnetic
ballast
Distribution
N Narrow
NOTES
M
Medium
®
1 Philips Mini MasterColor available in 20W & 120V only.
W Wide
Consult factory for availability on 39W.
2 Available with electronic ballast only.
3 Available in 39W & 70W only.
4 Available in 39W, 70W & 150W only.
5 Not available with finishes.
6 Available with 70W & 150W electro-magnetic ballast only.
7 For compatible Reloc system, refer to Technical Bulletins tab.
Options
SF
TRW
TRBL
L/LP
LRC7
Single fuse
White painted flange
Black painted flange
Less lamp
Provides compatibility
with Lithonia Reloc®
System. Lithonia Reloc
System can be installed
less this option with
connectors provided
by others. Access above
ceiling required
CP Chicago Plenum
ATH 6
DHID-320
6" ATH Open Reflector
Distribution curve
Distribution data
Output data
Coefficient of utilization
Illuminance Data at 30" Above Floor for
a Single Luminaire
ATH T6 70M 6AR N, CMH70/U/942/G12 lamp, 6400 rated lumens, 0.5 s/mh, Test No. LTL15371
90°
80°
70°
2300
60°
4600
50°
6900
40°
9200
11500
0°
10°
20°
30°
F rom 0°
0
5
15
25
35
45
55
65
75
85
90
Ave
11970
10682
5829
2151
671
138
8
3
1
0
0
Lumens
936
1597
1012
436
119
9
4
2
1
Zone Lumens % Lamp
55.4
0° - 30° 3545.9
62.2
0° - 40° 3982.2
64.2
0° - 60° 4110.2
64.3
0° - 90° 4115.9
0.0
90° - 180° 0.0
0° - 180° 4115.9 *64.3
*E fficiency
pf
pc
pw
1
2
3
4
5
6
7
8
9
10
20%
80%
70%
50%
50% 30% 50% 30% 50% 30%
.72 .71 .71 .69 .68 .67
.68 .66 .67 .65 .65 .63
.64 .62 .64 .61 .62 .60
.61 .58 .60 .58 .59 .57
.58 .55 .58 .55 .57 .54
.56 .52 .55 .52 .54 .52
.53 .50 .53 .50 .52 .49
.51 .48 .51 .48 .50 .47
.49 .46 .49 .46 .48 .45
.47 .44 .47 .44 .46 .44
Inital fc
Mount at beam
height center
395.7
8
212.8
10
132.6
12
90.5
14
65.7
16
50% beam angle 10% beam angle
27.1°
54.1°
fc at
fc at
beam
beam
B eam
B eam
diameter edge diameter edge
39.6
5.6
197.9
2.6
21.3
7.7
106.4
3.6
13.3
9.7
66.3
4.6
9.0
11.8
45.3
5.5
6.6
13.8
32.8
6.5
ATH T6 70M 6AR M, CMH70/U/942/G12 lamp, 6400 rated lumens, 0.8 s/mh, Test No. LTL15392
90°
80°
70°
1100
60°
2200
50°
3300
40°
4400
5500
0°
10°
20°
30°
F rom 0°
0
5
15
25
35
45
55
65
75
85
90
Ave
5828
5395
4744
2923
1405
274
15
4
2
1
0
Lumens
500
1299
1340
875
251
14
5
2
1
Zone Lumens % Lamp
49.0
0° - 30° 3138.7
62.7
0° - 40° 4013.8
66.9
0° - 60° 4278.5
67.0
0° - 90° 4286.5
0.0
90° - 180° 0.0
0° - 180° 4286.5 *67.0
*E fficiency
pf
pc
pw
1
2
3
4
5
6
7
8
9
10
20%
80%
70%
50%
50% 30% 50% 30% 50% 30%
.74 .73 .73 .71 .70 .69
.69 .67 .68 .66 .66 .64
.65 .62 .64 .61 .62 .60
.61 .57 .60 .57 .59 .56
.57 .53 .56 .53 .55 .52
.54 .50 .53 .49 .52 .49
.51 .47 .50 .46 .49 .46
.48 .44 .47 .44 .47 .43
.45 .41 .45 .41 .44 .41
.43 .39 .43 .39 .42 .39
Inital fc
Mount at beam
height center
192.7
8
103.6
10
64.6
12
44.1
14
32.0
16
50% beam angle 10% beam angle
43.3°
74.5°
fc at
fc at
beam
beam
B eam
B eam
diameter edge diameter edge
19.3
8.4
96.3
4.4
10.4
11.4
51.8
6.0
6.5
14.4
32.3
7.5
4.4
17.5
22.0
9.1
3.2
20.5
16.0
10.7
ATH T6 70M 6AR W, CMH70/T/U/942/G12 lamp, 6400 rated lumens, 1.2 s/mh, Test No. LTL15179
90°
80°
500
70°
1000
60°
1500
50°
2000
40°
2500
30000°
10°
20°
30°
F rom 0°
0
5
15
25
35
45
55
65
75
85
90
Ave Lumens
2966
2783
262
2726
773
2957
1348
2448
1455
427
413
27
27
12
12
6
6
1
2
0
Zone Lumens % Lamp
37.2
0° - 30° 2383.4
60.0
0° - 40° 3838.3
66.9
0° - 60° 4278.6
67.2
0° - 90° 4298.9
0.0
90° - 180° 0.0
0° - 180° 4298.9 *67.2
*E fficiency
pf
pc
pw
1
2
3
4
5
6
7
8
9
10
20%
80%
70%
50%
50% 30% 50% 30% 50% 30%
.74 .72 .72 .71 .70 .68
.68 .65 .67 .64 .65 .63
.63 .59 .62 .59 .60 .57
.58 .54 .57 .53 .56 .52
.54 .49 .53 .49 .52 .48
.50 .45 .49 .45 .48 .44
.46 .42 .46 .41 .45 .41
.43 .38 .43 .38 .42 .38
.40 .36 .40 .35 .39 .35
.37 .33 .37 .33 .36 .33
50% beam angle 10% beam angle
67.7°
86.2°
fc at
fc at
Inital fc
beam
beam
B eam
Mount at beam B eam
height center diameter edge diameter edge
8
98.0
7.4
49.0
10.3
9.8
10
52.7
10.1
26.4
14.0
5.3
12
32.9
12.7
16.4
17.8
3.3
14
22.4
15.4
11.2
21.5
2.2
16
16.3
18.1
8.1
25.3
1.6
ATH T6 150M 6AR N, CMH150/T/U/942/G12 lamp, 13000 rated lumens, 0.5 s/mh, Test No. LTL15387
90°
80°
70°
4100
60°
8200
50°
12300
40°
16400
20500
0°
10°
20°
30°
F rom 0°
0
5
15
25
35
45
55
65
75
85
90
Ave
20975
18872
11012
4738
1590
313
21
8
5
2
0
Lumens
1666
3023
2192
1025
270
22
8
4
1
Zone Lumens % Lamp
52.9
0° - 30° 6881.7
60.8
0° - 40° 7907.0
63.1
0° - 60° 8198.8
63.2
0° - 90° 8212.5
0.0
90° - 180° 0.0
0° - 180° 8212.5 *63.2
*E fficiency
pf
pc
pw
1
2
3
4
5
6
7
8
9
10
20%
80%
70%
50%
50% 30% 50% 30% 50% 30%
.71 .69 .69 .68 .67 .66
.66 .64 .65 .63 .63 .62
.63 .60 .62 .59 .60 .58
.59 .56 .59 .56 .57 .55
.56 .53 .56 .53 .55 .52
.54 .51 .53 .50 .52 .50
.51 .48 .51 .48 .50 .47
.49 .46 .49 .46 .48 .45
.47 .44 .47 .44 .46 .43
.45 .42 .45 .42 .44 .41
Inital fc
Mount at beam
height center
8
693.4
10
372.9
12
232.4
14
158.6
16
115.1
50% beam angle 10% beam angle
28.6°
58.0°
fc at
fc at
B eam
beam
B eam
beam
diameter edge diameter edge
6.1
69.3
2.8
346.8
8.3
37.3
3.8
186.5
10.5
23.2
4.8
116.2
12.8
15.9
79.3
5.9
57.6
15.0
11.5
6.9
NOTES:
1. For electrical characteristics consult Technical Bulletins tab.
2. 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 are based on the most current available data and are subject to change without notice.
DHID-320
©2006 Gotham, Rev. 10/06
DHID-320.p65