COOPER LIGHTING - METALUX
®
DESCRIPTION
The GR8 is a T8-dedicated lensed troffer designed to offer premium
performance in a low profile housing. T8 dedication and optimized
lamp to lens spacing provides the best in energy efficiency and optical
control. The GR8’s shallow, low profile housing is compatible with even
highly restrictive plenums. Luminaires are compatible with today’s
popular ceiling systems. The GR8 offers great performance and great
quality. The series is an excellent choice for commercial offices,
schools, hospitals, retail merchandising and many other applications.
Type
Catalog #
Project
Date
Comments
Prepared by
SPECIFICATION FEATURES
Construction
Electrical**
Frame/Shielding
Unitized low profile recessed
housing is die formed of code
gauge prime cold rolled steel with
full length stiffeners and unibody
endplate for added strength.
Ballast cover is easily removed
without tools. Die formed captive
lampholder bracket fully encloses
lampholder wiring for easy
lampholder replacement. Ample
KOs are provided for continuous
row wiring. Built-in 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.
Heavy gauge flat steel door is die
formed with reinforced mitered
corners. Housing and door frame
assemblies incorporate full width
mechanical light traps. Light
stabilized, acrylic prismatic lens.
Finish
Multistage, iron phosphate
pretreatment ensures maximum
bonding and rust inhibition.
Lighting grade baked white
enamel finish with premium
reflectance for high efficiency.
Hinging/Latching
Positive spring loaded steel
latches and safety lock T-hinges
provide secure, high quality door
fit and allow hinging and latching
from either side.
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.
2GR8
228T8, 232
428T8, 432
2' X 4' TROFFER
2 OR 4 LAMP
General Purpose
T8 Commercial Troffer
3-1/4"
[83mm]
ENERGY DATA
Input Watts:
EB Ballast & STD Lamps
228T8 (49), 232 (61)
428T8 (98), 432 (122)
23-3/4" [603mm]
Luminaire Efficacy Rating
LER = FL-82
Catalog Number: 2GR8-232A
LAMP CONFIGURATIONS
MOUNTING DATA
2 LAMP
Location of Standard
Access Opening
3-1/4" [83mm]
1-1/2"
[38mm]
1-1/2"
[38mm]
Yearly Cost of 1000 lumens,
3000 hrs at .08 KWH = $2.93
10-3/4"
[274mm]
23-3/4" [603mm]
23-3/4"
[603mm]
Catalog Number: 2GR8-432A
LER = FL-76
4 LAMP
1"
[26mm]
3-1/2"
[89mm]
3-1/4" [83mm]
3-1/8"
[80mm]
47-15/16" [1218mm]
X=4-3/16"
[107mm]
Y=4-3/4"
[121mm]
X
Y
Yearly Cost of 1000 lumens,
3000 hrs at .08 KWH = $3.16
X
23-3/4" [603mm]
*Standard G (Grid) Type Fixtures can be
field converted by adding trim kits. See
Compatibility Section or Consult Factory.
DOOR FRAMES
2GR8
F lat, White
Steel ( White
L atches)
**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
COOPER LIGHTING
G
Slot Grid
F
Flange Trim
With Supporting
Swing Gates
Ceiling
Type
Trim
Type
Exposed Grid
Concealed T
Slot Grid
Flange
G
G
G
G***
LAMPS CONTAIN MERCURY. DISPOSE ACCORDING TO LOCAL,
STATE OR FEDERAL LAWS
Safe and convenient means of
disconnecting power.
ADF012707
2GR8
PHOTOMETRICS
2GR8-232A
Electronic Ballast
(2) F32T8 lamps
3100 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.4 x
mounting height
Efficiency 79.4%
Test Report:
2GR8-232A.IES
LER = FL-82
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $2.93
Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Along II
1851
1855
1830
1790
1731
1653
1554
1434
1297
1127
922
731
570
430
316
224
162
87
0
Across ⊥
1851
1851
1845
1834
1813
1776
1720
1650
1551
1400
1182
924
675
476
343
262
198
114
0
45°
1851
1846
1830
1806
1768
1714
1643
1551
1424
1251
1060
851
619
413
261
179
142
89
0
Coefficients of Utilization
rc
rw
RCR
0
1
2
3
4
5
6
7
8
9
10
95
83
73
65
58
52
47
43
39
36
33
95
80
68
59
51
45
40
36
32
29
27
95
77
64
54
46
40
35
31
28
25
23
92
85
77
71
65
60
56
52
48
45
42
92
82
72
64
57
51
46
42
38
35
33
92
79
67
58
51
45
40
36
32
29
27
92
76
63
53
46
40
35
31
28
25
23
20%
50%
50 30 10
30%
50 30 10
10%
50 30 10
0%
0
88
78
69
61
55
49
45
41
37
34
32
84
75
66
59
53
48
43
40
36
33
31
81
72
64
57
51
46
42
39
35
33
30
79
68
57
49
42
37
32
29
26
23
21
88
76
65
56
49
44
39
35
32
29
26
88
74
62
52
45
39
35
31
28
25
23
84
73
63
55
48
43
38
34
31
28
26
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
1476
2440
4149
4924
4924
%Lamp
23.8
39.4
66.9
79.4
79.4
Candela
Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Along II
3662
3664
3613
3531
3413
3260
3067
2829
2538
2188
1816
1457
1138
859
626
447
314
172
14
Across ⊥
3662
3657
3640
3610
3555
3461
3327
3155
2918
2591
2176
1729
1304
950
687
517
380
214
47
45°
3662
3647
3614
3560
3480
3365
3206
2998
2723
2383
2023
1630
1212
827
530
359
272
167
33
Coefficients of Utilization
Effective floor cavity reflectance
80%
70%
70 50 30 10
70 50 30 10
95
87
80
73
67
62
57
53
49
46
43
2GR8-432A
Electronic Ballast
(4) F32T8 lamps
3100 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.3 x
mounting height
Efficiency 77.1%
Test Report:
2GR8-432A.IES
LER = FL-76
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $3.16
Candela
%Fixture
30.0
49.6
84.3
100.0
100.0
Average
0-Deg
cd/sm
2556
2044
1632
1388
1601
84
71
60
52
45
39
34
31
27
25
22
Average
45-Deg
cd/sm
2838
2380
1567
1109
1638
81
71
61
54
47
42
38
34
31
28
26
81
69
59
51
44
38
34
30
27
25
22
Average
90-Deg
cd/sm
3176
2594
1807
1624
2098
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
84
77
71
65
60
56
52
48
45
42
92
81
71
63
56
50
46
41
38
35
32
92
78
66
57
50
44
39
35
31
29
26
92
75
62
52
45
39
34
30
27
24
22
90
82
75
69
63
58
54
50
47
44
41
90 90
79 76
70 65
62 56
55 49
50 43
45 39
41 35
37 31
34 28
32 26
90
74
61
52
44
39
34
30
27
24
22
20%
50%
50 30 10
30%
50 30 10
50
86
76
67
60
53
48
43
40
36
33
31
82
73
65
57
52
46
42
39
35
33
30
79
70
62
56
50
45
41
37
34
32
30
86
74
63
55
48
42
38
34
31
28
26
86
71
60
51
44
38
34
30
27
24
22
82
71
61
53
47
42
37
33
30
28
25
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
2902
4769
8035
9566
9566
%Lamp
23.4
38.5
64.8
77.1
77.1
%Fixture
30.3
49.9
84.0
100.0
100.0
82
69
59
50
43
38
33
30
27
24
22
Average
0-Deg
cd/sm
4963
4074
3260
2770
3165
Average
45-Deg
cd/sm
5406
4558
3139
2225
3073
10%
30 10
79
69
60
52
46
41
37
33
30
27
25
79
67
57
49
43
37
33
30
27
24
22
0%
0
77
66
56
48
41
36
32
28
25
23
21
Average
90-Deg
cd/sm
5877
4835
3606
3204
3938
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
4/13
ADF012707
2GR8
ORDERING INFORMATION
SAMPLE NUMBER: 2GR8-232A-UNV-EB81-U
Rating (4)
Blank=
Standard
ATW-SW4=
Chicago
Rated
Width
2=2' Width
Trim Type
G=Grid/Lay-in
(Standard)
Series
R8=General Purpose
T8 Commercial
Troffer (1)
Number of
Lamps
2=2 Lamps
4=4 Lamps
Voltage (2)
347V=347 Volt
UNV=Universal
Voltage 120-277 (3)
(Not included)
Wattage
28T8=28W T8 (48")
32=32W T8 (48") (5)
Shielding
A=#12 Acrylic Pattern
A125=#12 Pattern Acrylic
(.125" Thick)
A19/156=#19 Pattern
Acrylic (.156" Thick)
PB1S=Silver Parabolic
Louver (1/2" x 1/2" x 1/2")
Options
GL=Single Element Fuse
GM=Double Element Fuse
Flex=Flex Installed
(Reference Flex ordering
information)
EL=Emergency Installed
Lamps Installed
Blank=No Lamps Installed
L8835=T8 Lamp, 28W and
32W, 3500K
L8841=T8 Lamp, 28W and
32W, 4100K
L8835HL=T8 Lamp, 32W,
3500K, 3100 Lumens
L8841HL=T8 Lamp, 32W,
4100K, 3100 Lumens
(1)
NOTES: An EQ Grid Clip is recommended for all 9/16" ceiling systems. Four required per
(2)
fixture. Products also available in non-US voltages and frequencies for international markets.
(3)
(4)
Not available when specifying emergencies, voltage must be specific. For NYC rated product,
(5)
(6)
see separate specification sheets. Ballast Factor is 0.88 for 4 lamp 32W T8 fixtures. For a
complete listing of Fifthlight Technology products and other solutions from Cooper Controls, visit
(7)
www.coopercontrol.com. 0-10V ballast do not include DALI feature. Please select DALI ballast for use
(8)
with Fifth Light system. Specification grade 0-10V dimming ballast are NEMA premium and CEE
(9)
listed. They are compatible with low mercury and energy saving lamps. Specification Grade 0-10V
(10)
ballast not offered in 3 or 4-lamp versions.
Standard 0-10V ballast not available for 28W T8 lamps.
(11)
Voltage must be specified for Standard 0-10V 32W 3 and 4-lamp ballast. 4-lamp ballast versions
must be 277V.
For complete product data, reference the Fluorescent Specification binder. Specifications &
dimensions subject to change without notice. Consult your Cooper Lighting Representative for
availability and ordering information.
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 Label
Packaging
U=Unit Pack
ACCESSORIES
EQ-CLIP-U=T-BAR Safety Earthquake Clips (1)
FCTKA-24W-U=Field Installed Flange Kit
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
0-10V Dimming Ballasts (7)
5LTV8 =T8 0-10V Program Rapid Start.
Total Harmonic Distortion < 10%.
Ballast Factor 0.87 (10), (11)
5LTVS8 =T8 0-10V Spec Grade Program Rapid
Start. Total Harmonic Distortion <
10%. Ballast Factor 0.87 (8), (9)
Fifth Light DALI Ballasts (6)
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
SHIPPING INFORMATION
Catalog No.
Wt.
2GR8-228T8A
2GR8-232A
2GR8-428T8A
2GR8-432A
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
4/13
ADF012707