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.
Catalog #
The GC8 series features efficiency, quality and performance. The series
is an excellent choice for commercial office spaces, schools, hospitals
or retail merchandising areas.
Prepared by
Type
Project
Date
Comments
SPECIFICATION FEATURES
Construction
Electrical
Frame/Shielding
Rigid housing is die formed of code
gauge prime cold rolled steel and
features full length die-formed
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 ballast
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. KOs 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
mounting bolts. Rotor lock
lampholders. UL/CUL listed.
Suitable for damp locations.**
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.
Light stabilized, acrylic
prismatic lens. Standard #12
pattern. Numerous additional
shielding options available.
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.
Hinging/Latching
Positive Cam latch with baked
white enamel finish. Safety-lock Thinges allow hinging and latching
either side.
2GC8
228T8
232
428T8
432
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 4' TROFFER
2 OR 4 LAMP
Specification T8 Troffer
3-1/4"
[83mm]
ENERGY DATA
23-3/4" [603mm]
Input Watts:
HB Ballast & STD Lamps
228T8 (48), 232 (53)
428T8 (96), 432 (107)
DOOR FRAMES
MOUNTING DATA
GC8
Flat, White
Steel
Location of Standard
Access Opening
1-1/2"
[38mm]
GC8FA
Flat, Extruded
White Aluminum
GC8RA
Deep, Regressed,
Extruded Natural Aluminum
1-1/2"
[38mm]
23-3/4"
[603mm]
Yearly Cost of 1000 lumens,
3000 hrs at .08 KWH = $3.00
1"
[26mm]
3-1/2"
[89mm]
LAMP CONFIGURATIONS
3-1/8"
[79mm]
47-15/16" [1218mm]
*Reference the lamp/ballast data in the
Technical Section for specific lamp/ballast
requirements.
3-1/4" [83mm]
10-3/4"
[274mm]
23-3/4" [603mm]
**Consult Pre Sales Technical Support.
***Full sized ballast cover for biaxial lamps
and emergency option may apply.
3-1/4" [83mm]
X=4-3/16"
[107mm]
Y=5-3/8"
[137mm]
CEILING COMPATIBILITY
G
Grid/Lay-in
Standard
G
Concealed T
G
Slot Grid
Luminaire Efficacy Rating
LER = FL-80
Catalog Number: 2GC8-232A
F
Flange Trim
With Supporting
Swing Gates
X
Y
****When ordering Flange Kit for
installation in drywall ceilings, see options
and accessories compatibility section and
ordering logic.
X
23-3/4" [603mm]
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
ADF091407
2GC8 T8
PHOTOMETRICS
2GC8-232A
Electronic Ballast
(2) F032/35K
T8 lamps
3100 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.4 x
mounting height
Efficiency 84.7%
Test Report:
2GC8-232A.IES
LER = FL-80
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $3.00
Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Along II
1963
1966
1940
1895
1834
1753
1646
1525
1373
1186
986
795
623
471
347
247
175
93
7
Across ⊥
1963
1962
1956
1944
1924
1883
1822
1745
1635
1463
1235
974
734
528
383
288
212
118
23
45°
1963
1957
1941
1914
1876
1820
1741
1640
1502
1323
1131
917
677
460
295
198
151
92
16
Coefficients of Utilization
rc
rw
RCR
0
1
2
3
4
5
6
7
8
9
10
101
89
78
69
62
55
50
45
41
38
35
101 101
85 82
73 68
63 57
54 49
48 42
42 37
38 33
34 29
31 27
28 24
99
90
83
76
69
64
59
55
51
48
45
99
87
77
68
60
54
49
45
41
37
35
99
84
71
62
54
47
42
38
34
31
28
99
81
67
57
49
42
37
33
29
26
24
20%
50%
50 30 10
30%
50 30 10
50
94
83
74
65
58
52
48
43
40
37
34
90
80
71
63
56
51
46
42
39
36
33
86
77
68
61
55
49
45
41
38
35
32
94
81
69
60
53
46
41
37
34
31
28
94
78
66
56
48
42
37
33
29
26
24
90
78
67
59
51
45
41
37
33
30
28
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
1565
2585
4403
5254
5254
%Lamp
25.2
41.7
71.0
84.7
84.7
Candela
Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Along II
3892
3891
3838
3750
3626
3460
3256
3001
2700
2329
1924
1543
1203
907
669
472
335
182
15
Across ⊥
3892
3885
3865
3826
3758
3654
3510
3321
3071
2728
2295
1825
1386
1004
729
547
405
228
48
45°
3892
3875
3839
3777
3687
3561
3388
3164
2878
2520
2136
1724
1288
877
563
378
287
175
32
Coefficients of Utilization
Effective floor cavity reflectance
80%
70%
70 50 30 10
70 50 30 10
101
93
85
78
71
66
61
56
53
49
46
2GC8-432A
Electronic Ballast
(4) F032/35K
T8 lamps
3100 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.3 x
mounting height
Efficiency 81.6%
Test Report:
2GC8-432A.IES
LER = FL-85
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $2.82
Candela
%Fixture
29.8
49.2
83.8
100.0
100.0
Average
0-Deg
cd/sm
2690
2223
1788
1531
1712
90
76
64
55
47
41
36
32
29
26
24
10%
30 10
Average
45-Deg
cd/sm
3001
2564
1746
1227
1693
86
75
65
57
50
45
40
36
33
30
27
86
74
63
54
47
41
36
32
29
26
24
0%
0
85
72
61
52
45
39
34
30
27
25
22
Average
90-Deg
cd/sm
3319
2724
2004
1785
2172
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
97
89
82
75
69
64
59
55
51
48
45
97
86
75
67
59
53
48
44
40
37
34
97
82
70
60
53
46
41
37
33
30
28
97
79
66
55
47
41
36
32
29
26
23
95
87
80
73
67
62
57
53
50
46
44
95
84
74
65
58
53
47
43
40
36
34
95
81
69
60
52
46
41
37
33
30
28
20%
95
78
65
55
47
41
36
32
29
26
23
50%
50 30 10
30%
50 30 10
50
91
80
71
63
56
51
46
42
38
35
33
87
77
68
61
55
49
45
41
37
35
32
83
74
66
59
53
48
43
40
36
34
31
91
78
67
58
51
45
40
36
33
30
27
91
76
63
54
46
40
36
32
28
26
23
87
75
65
57
50
44
39
35
32
29
27
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
3075
5048
8502
10124
10124
%Lamp
24.8
40.7
68.6
81.6
81.6
%Fixture
30.4
49.9
84.0
100.0
100.0
Average
0-Deg
cd/sm
5283
4315
3442
2925
3349
87
73
62
53
46
40
35
31
28
26
23
10%
30 10
Average
45-Deg
cd/sm
5716
4821
3329
2343
3221
83
73
63
55
49
43
39
35
32
29
27
83
71
61
52
45
40
35
31
28
25
23
0%
0
82
69
59
50
43
38
33
30
27
24
22
Average
90-Deg
cd/sm
6188
5104
3811
3390
4196
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
ADF091407
2GC8 T8
ORDERING INFORMATION
SAMPLE NUMBER: 2GC8-232A-UNV-HB81-U
Rating (5)
Blank=
Standard
ATW-SW4=
Chicago
Rated
Width
2=2' Width
Trim Type
G=Grid/Lay-in (Standard) (1)
G=Concealed T
G=Slot Grid
F=Flange Trim
Series
C8=Specification T8 Troffer
Door Frame
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 or 4 Lamps
(Not included)
Wattage (Length)
28T8=28W T8 (48")
32=32W T8 (48")(8)
Shielding
A=#12 Acrylic Pattern
A125=#12 Acrylic Pattern
(.125" Thickness)
A19/156=#19 Acrylic Pattern
(.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 (3)
347V=347 Volt
UNV=Universal Voltage 120-277 (4)
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. Standard off-center ballast on 3-lamp
(3)
(4)
fixtures. Products also available in non-US voltages and frequencies for international markets. Not available
(5)
when specifying emergencies, voltage must be specific. For NYC rated product, see separate specification
(6)
(7)
sheets. Specify row configuration, type in catalog number when ordering complete fixture. For a complete
listing of Fifthlight Technology products and other solutions from Cooper Controls, visit www.coopercontrol.com.
(8)
(9)
Ballast Factor is 0.88 for 4 lamp 32W T8 fixtures. 0-10V ballast do not include DALI feature. Please select DALI ballast
(10)
for use with Fifth Light system.
Specification grade 0-10V dimming ballast are NEMA premium and CEE listed. They
(11)
are compatible with low mercury and energy saving lamps.
Specification Grade 0-10V ballast not offered in 3 or 4(12)
(13)
lamp versions.
Standard 0-10V ballast not available for 28W T8 lamps.
Voltage must be specified for Standard 010V 32W 3 and 4-lamp ballast. 4-lamp ballast versions must be 277V.
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
Options
FR=Fire Rated Label
REP=Riveted End Plates
PAF=Painted After
Fabrication
Packaging
U=Unit Pack
PAL=Job Pack, out of carton
PALC=Job Pack, in carton
0-10V Dimming Ballasts (9)
5LTV8 =T8 0-10V Program Rapid Start.
Total Harmonic Distortion < 10%.
Ballast Factor 0.87 (12), (13)
5LTVS8 =T8 0-10V Spec Grade Program
Rapid Start. Total Harmonic
Distortion < 10%.
Ballast Factor 0.87 (10), (11)
Fifth Light DALI Ballasts (7)
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
Specifications & dimensions subject to change without notice. Consult your Cooper Lighting Representative for
availability and ordering information.
SHIPPING INFORMATION
Catalog No.
Wt.
2GC8-228T8A
2GC8-232A
2GC8-428T8A
2GC8-432A
20 lbs.
20 lbs.
20 lbs.
20 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
ADF091407