METALUX
®
DESCRIPTION
GC8 is a premium grade specification lensed troffer series. This
innovative, high quality luminaire is dedicated to the latest T8 lamp and
micro electronic ballast technology for optimal performance and energy
efficiency. The GC8 is compatible with all of today’s popular ceiling
systems and is available with a number of options and accessories for
application versatility. The GC8 series features efficiency, quality and
performance. The series is an excellent choice for commercial office
spaces, schools, hospitals or retail merchandising areas.
Type
Catalog #
Project
Date
Comments
Prepared by
SPECIFICATION FEATURES
Construction
Electrical
Hinging/Latching
Rigid housing is die formed of
code gauge prime cold rolled
steel and features full length dieformed stiffeners and unibody
endplate for added strength. Side
flanges are hemmed. Innovative
design provides superior lens
brightness uniformity and visual
comfort. Micro ballast cover***
reduces ballst shadow for
superior lens brightness
uniformity and is easily removed
without tools. Die formed captive
lampholder brackets fully enclose
lampholder wiring permitting
easy lampholder replacement.
Unibody endplates are securely
attached with interlocking tabs
and screws. Four auxiliary fixture
end suspension points provided.
Ample KOs are provided for
continuous row wiring. Endplates
have integral Grid-lock feature for
safety and convenience.
Ballasts are CBM/ETL Class
“P” and are positively
secured by Rotor-lock T8
lampholders. Biaxial
models use 2G11 base
lampholders with doubleedge wiping action
pressure-lock contacts and
horizontally oriented lamp
support clips. UL/CUL
listed. Suitable for damp
locations.
Positive Cam latch with baked white
enamel finish. Safety-lock T-hinges
allow hinging and latching either
side.
Finish
Multistage, iron phosphate
pretreatment ensures
maximum bonding and rust
inhibition. Housing and
ballast cover finished with
new 90% reflective white
enamel for superior
performance. “PAF”
Painted After Fabrication
option also available.
Frame/Shielding
Die formed, heavy gauge, flat steel
door with reinforced mitered corners
and baked white enamel finish. Flat
and regressed aluminum doors also
available. Positive light seals. Acrylic
prismatic lens. Standard #12 pattern.
Numerous additional shielding
options available.
2GC8
2U6T8
2BX40
2U1-5/8
Controls
Fifth Light ballast options are offered
for both 0-10V continuous dimming
and DALI applications. Combine with
energy-saving products like
occupancy sensors, daylighting
controls, and lighting relay panels
from Cooper Controls
(www.coopercontrol.com) to
maximize energy savings.
2' X 2' TROFFER
2 LAMPS
Specification T8 Troffer
3-1/4"
[83mm]
ENERGY DATA
Input Watts:
23-3/4" [603mm]
EB Ballast & STD Lamps
2U1-5/8 (61), 2U6T8 (61), 2BX40 (71)
MOUNTING DATA
LAMP CONFIGURATIONS
2U6T8
2BX40, 2U1-5/8, 217, 417
3-1/4" [83mm]
1"
[26mm]
1-1/2"
[38mm]
23-3/4"
[603mm]
23-3/4"
[603mm]
ES Ballast & STD Lamps
2U1-5/8 (71), 2U6T8 (71), 2BX40 (77)
2U6T8
X=5-3/16"
[132mm]
2-11/16"
[69mm]
6"
6"
X
[152mm]
[152mm]
23-3/4" [603mm]
2U1-5/8
3-1/4" [83mm]
1-1/2"
[38mm]
2-7/8" [74mm]
23-15/16" [610mm]
DOOR FRAMES
GC8
F lat, White
Steel
X=1-5/8"
[41mm]
2-3/4" [70mm]
5-3/4" [146mm]
23-15/16" [610mm]
10-3/8"
X
X
[264mm]
23-3/4" [603mm]
GC8RA
D eep, R egressed,
E xtruded Natural Alum inum
X=13/16"
[21mm]
Yearly Cost of 1000 lumens, 3000
hrs at .08 KWH = $3.12
*Standard G (Grid) Type Fixtures can be
field converted by adding trim kits. See
Compatibility Section or Consult Factory.
2BX40
3-1/4" [83mm]
GC8FA
F lat, E xtruded
White Alum inum
Luminaire Efficacy Rating
LER = FL-77
Catalog Number: 2GC8-2U6T8
11"
X [280mm] X
23-3/4" [603mm]
**Reference the lamp/ballast data in the
Technical Section for specific lamp/ballast
requirements.
***When ordering Flange Kit for
installation in drywall ceilings, see options
and accessories compatibility section and
ordering logic.
CEILING COMPATIBILITY
G
Grid/Lay-in
Standard
G
Concealed T
G
Slot Grid
F
Flange Trim
With Supporting
Swing Gates
Ceiling
Type
Trim
Type
Exposed Grid
Concealed T
Slot Grid
Flange
G
G
G
F
LAMPS CONTAIN MERCURY. DISPOSE ACCORDING TO
LOCAL, STATE OR FEDERAL LAWS
Safe and convenient means of
disconnecting power.
(Verify compatibility/ consult
factory.)
COOPER LIGHTING
ADF110984
2GC8
PHOTOMETRICS
2GC8-2U6T8A
Electronic Ballast
(2) 31W U6T8 lamps
2850 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.3 x
mounting height
Efficiency 80.1%
Test Report:
2GC82U6T8A.IES
LER = FL-77
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $3.12
Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Along II
1847
1843
1812
1763
1697
1610
1507
1378
1222
1046
845
663
512
378
283
218
159
84
0
Across ⊥
1847
1848
1838
1819
1788
1733
1647
1539
1408
1243
1031
798
592
415
319
254
183
91
0
45°
1847
1838
1820
1786
1738
1671
1581
1459
1312
1121
910
706
511
339
229
181
152
89
0
Coefficients of Utilization
rc
rw
RCR
0
1
2
3
4
5
6
7
8
9
10
95
84
74
66
59
53
48
44
40
37
34
95
81
69
60
52
46
41
37
33
30
28
95
78
65
55
47
41
36
32
29
26
24
93
86
78
72
66
61
57
53
49
46
43
93
82
73
65
58
52
47
43
39
36
34
93
79
68
59
52
46
41
37
33
30
28
93
77
64
54
47
41
36
32
29
26
24
50%
50 30 10
30%
50 30 10
10%
50 30 10
0%
0
89
79
70
62
56
50
46
42
38
35
33
85
76
67
60
54
49
44
41
37
35
32
82
73
65
58
52
47
43
40
36
34
31
80
68
58
50
43
38
34
30
27
24
22
89
77
66
58
51
45
40
36
33
30
27
89
74
63
54
46
40
36
32
29
26
24
85
74
64
56
49
44
39
36
32
29
27
Luminance Data
Zone
0-30
0-40
0-60
0-90
0-180
Angle
in Deg
45
55
65
75
85
%Lamp
25.4
41.4
68.0
80.1
80.1
LER = FL-74
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $3.24
20%
Zonal Lumen Summary
Lumens
1450
2359
3874
4567
4567
2GC82U6T8A19_156.IES
Candela
Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Along II
2045
2036
2003
1949
1874
1777
1667
1547
1372
1059
648
405
235
135
99
95
78
45
0
Across ⊥
2045
2042
2026
1998
1956
1907
1847
1771
1621
1246
710
407
238
135
102
99
81
47
0
45°
2045
2035
2007
1965
1911
1837
1746
1631
1446
1110
760
585
399
253
143
88
52
39
0
Coefficients of Utilization
Effective floor cavity reflectance
80%
70%
70 50 30 10
70 50 30 10
95
88
80
74
68
63
58
54
50
47
44
2GC8-2U6T8A156
Electronic Ballast
(2) 31W U6T8 lamps
2850 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.3 x
mounting height
Efficiency 77.1%
Test Report:
Candela
%Fixture
31.7
51.7
84.8
100.0
100.0
Average
0-Deg
cd/sm
3979
3109
2406
2266
2593
85
72
61
53
46
40
35
32
28
26
23
Average
45-Deg
cd/sm
4265
3311
2158
1881
2747
82
71
62
55
48
43
39
35
32
29
27
82
70
60
52
45
40
35
31
28
26
23
Average
90-Deg
cd/sm
4729
3743
2642
2640
2809
rc
rw
RCR
0
1
2
3
4
5
6
7
8
9
10
Effective floor cavity reflectance
80%
70%
70 50 30 10
70 50 30 10
92
85
79
73
68
63
58
54
51
48
45
92
82
74
66
59
54
49
45
41
38
35
92
79
69
61
54
48
43
39
35
32
29
92
77
65
56
49
43
38
34
31
28
26
90
83
77
71
66
61
57
53
50
46
44
90
81
72
65
58
53
48
44
41
37
35
90
78
68
60
53
47
42
38
35
32
29
90
76
65
56
49
43
38
34
31
28
26
20%
50%
50 30 10
30%
50 30 10
50
86
77
69
63
57
51
47
43
40
37
34
82
74
67
61
55
50
46
42
39
36
33
79
72
65
59
53
49
45
41
38
35
33
86
75
66
58
52
46
42
38
34
31
29
86
73
63
55
48
42
38
34
31
28
25
82
73
64
57
51
46
41
37
34
31
29
Zonal Lumen Summary
Luminance Data
Zone
0-30
0-40
0-60
0-90
0-180
Angle
in Deg
45
55
65
75
85
Lumens
1598
2621
3963
4396
4396
%Lamp
28.0
46.0
69.5
77.1
77.1
%Fixture
36.3
59.6
90.1
100.0
100.0
Average
0-Deg
cd/sm
4029
1899
859
987
1389
82
71
62
54
47
42
38
34
31
28
25
Average
45-Deg
cd/sm
4223
2744
1610
915
1204
10%
30 10
79
70
62
56
50
45
40
37
34
31
28
79
69
60
53
47
42
37
34
30
28
25
0%
0
77
68
59
51
45
40
36
32
29
26
24
Average
90-Deg
cd/sm
4740
1909
859
1029
1451
Visit our web site at www.cooperlighting.com
Customer First Center 1121 Highway 74 South Peachtree City, GA 30269 770.486.4800
FAX 770.486.4801
2/24/16
ADF110984
2GC8
ORDERING INFORMATION
SAMPLE NUMBER: 2GC8-2U6T8A-UNV-EB81-U
Rating (5)
Blank=
Standard
ATW-SW4=
Chicago
Rated
Width
2=2' Width
Trim Type
G=Grid/Lay-in (1)
(Standard)
G=Concealed T
G=Slot Grid
F=Flange Trim
Series
C8=Specification T8 Troffer
Standard=Flat White Steel Door
(Leave Blank)
FA=Flush White Extruded
Aluminum c/w Spring Latch
RA=Regressed White Extruded
Aluminum
FAN=Flush Natural Anodized
Extruded Aluminum
RAN=Regressed Natural
Anodized Extruded Aluminum
FAB=Flush Black Extruded
Aluminum
RAB=Regressed Black Extruded
Aluminum
(1)
Number of
Lamps
2=2 Lamps
4=4 Lamps
(Not included)
Wattage
U6T8=32W (24")(10)
U1-5/8=31W T8 (24")(9)
BX40=40W Biaxial (24")
Shielding
A=#12 Acrylic Pattern
A125=#12 Pattern Acrylic (.125"
Thickness)
A19/156=#19 Pattern Acrylic
(.156" Thickness)
PB1S=1/2" x 1/2" x 1/2" Silver
Parabolic Louver (Styrene)
Option – Aluminum Flange Trim (6)
Blank=SW (Single White)
Type
Color
‘S’ Single
‘N’ Natural
‘R’ In Row
‘W’ White
‘E’ End of Row
Voltage (2)
347V=347 Volt
UNV=Universal Voltage 120-277 (3)
Options
GL=Single Element Fuse
GM=Double Element Fuse
Lamps=Lamps Installed
Flex=Flex Installed
EL=Emergency Installed
(2)
NOTES: An EQ Grid Clip is recommended for all 9/16" ceiling systems. Products also available in non-US
(3)
voltages and frequencies for international markets. Not available when specifying emergencies, voltage must be
(4)
(5)
specific. Consult Pre Sales Technical Support. For NYC rated product, see separate specification
(6)
(7)
sheets. Specify row configuration, type in catalog number when ordering complete fixture. Not available in UNV
(8)
voltages. Must specify voltage. For a complete listing of Fifthlight Technology products and other solutions from
(9)
(10)
Cooper Controls, visit www.coopercontrol.com. Fifthlight ballast option not available.
Ballast Factor is 0.88 for 4 lamp
(11)
32W T8 fixtures.
0-10V ballast do not include DALI feature. Please select DALI ballast for use with Fifth Light system.
(12)
Specification grade 0-10V dimming ballast are NEMA premium and CEE listed. They are compatible with low mercury
(13)
(14)
and energy saving lamps.
Specification Grade 0-10V ballast not available for Biax lamps.
Specification Grade 0-10V
(15)
(16)
ballast not offered in 3 or 4-lamp versions.
Standard 0-10V ballast not available for Biax lamps.
Standard 0-10V ballast
not offered in 3 or 4-lamp versions
Options
LAO=Less Access
Opening(4)
FR=Fire Rated Label
REP=Riveted End Plates
PAF=Painted After
Fabrication
Ballast Type
EB8 =T8 Electronic Start.
Total Harmonic Distortion < 10%
EB8 /PLUS= T8 Electronic Start.
Total Harmonic Distortion < 10%.
High Ballast Factor > 1.15.
ER8 = T8 Electronic Program Rapid Start.
Total Harmonic Distortion < 10%
High Performance T8 Ballasts
HB8 =T8 Electronic Instant Start.
Total Harmonic Distortion < 10%.
Standard Ballast Factor .86 – .88
HB8 L=T8 Electronic Instant Start.
Total Harmonic Distortion < 10%.
Low Ballast Factor .77 – .82
HB8 N=T8 Electronic Instant Start.
Total Harmonic Distortion < 10%.
Normal Ballast Factor 1.0
HB8 H=T8 Electronic Instant Start.
Total Harmonic Distortion < 10%.
High Ballast Factor 1.15 – 1.20
HR8 T8 Electronic Program Rapid Start.
Total Harmonic Distortion < 10%.
Standard Ballast Factor .86 – .88
HR8 DIM=T8 Electronic Program Rapid Start.
Total Harmonic Distortion < 10%.
Step Dimming. Ballast Factor .88
HR8 L=T8 Electronic Program Rapid Start.
Total Harmonic Distortion < 10%.
Low Ballast Factor .71 – .79
HR8 H=T8 Electronic Program Rapid Start.
Total Harmonic Distortion < 10%.
High Ballast Factor 1.15 – 1.20
Packaging
U=Unit Pack
PAL=Job Pack, out of carton
PALC=Job Pack, in carton
0-10V Dimming Ballasts (11)
5LTV8 =T8 0-10V Program Rapid Start.
Total Harmonic Distortion < 10%.
Ballast Factor 0.87 (15), (16)
5LTVS8 =T8 0-10V Spec Grade Program Rapid
Start. Total Harmonic Distortion <
10%. Ballast Factor 0.87 (12), (13), (14)
Fifth Light DALI Ballasts (8)
5LT8 =T8 DALI Program Rapid Start.
Total Harmonic Distortion < 10%.
Ballast Factor 1.0
Number of Ballasts
1=1 Ballast
2=2 Ballasts
3=3 Ballasts
ACCESSORIES
EQ-CLIP-U=T-BAR Safety Earthquake Clips (1)
FCTKA-22W-U=Field Installed Flange Kit
Specifications & dimensions subject to change without notice. Consult your Cooper Lighting Representative for
availability and ordering information.
FCTK
A – 24
R W – U
Trim Kit
Field
Convertible
22=2' x 2'
24=2' x 4'
N=Natural
W=White
Blank=Single
R=In Row
E=End Row
U=Unit Pack
Aluminum
SHIPPING INFORMATION
Catalog No.
Wt.
2GC8-2U6T8A
2GC8-2U1-5/8A
2GC8-2BX40A
12 lbs.
12 lbs.
15 lbs.
Visit our web site at www.cooperlighting.com
Customer First Center 1121 Highway 74 South Peachtree City, GA 30269 770.486.4800
FAX 770.486.4801
2/24/16
ADF110984