Technical Specifications

2 G R 8
ADF012705
Customer First Center 1121 Highway 74 South Peachtree City, GA 30269 770.486.4800 FAX [phone]
Visit our web site at www.cooperlighting.com
P H O T O M E T R I C S
C o e f f i c i e n t s o f U t i l i z a t i o n
Effective floor cavity reflectance 20%
rc 80% 70% 50% 30% 10% 0%
rw 70 50 30 10 70 50 30 10 50 30 10 50 30 10 50 30 10 0
RCR
0
1
2
3
4
5
6
7
8
9
10
Z o n a l L u m e n S u m m a r y
Zone Lumens %Lamp %Fixture
0-30
0-40
0-60
0-90
0-180
C a n d e l a
Angle Along II 45° Across ⊥
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
2GR8-2U6T8A
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:
2GR82U6T8A.IES
LER = FL-73
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $3.29
1775 1775 1775
1771 1769 1773
1742 1749 1768
1696 1717 1749
1629 1672 1719
1547 1607 1670
1443 1522 1591
1317 1406 1486
1171 1264 1363
996 1075 1195
805 877 993
638 688 780
491 495 574
361 330 406
271 224 307
210 175 245
153 146 179
82 86 90
0 0 0
92 92 92 92 90 90 90 90 86 86 86 82 82 82 79 79 79 77
84 81 78 75 82 79 77 74 76 74 72 73 71 69 70 69 67 66
77 72 67 63 75 70 66 62 67 64 60 65 62 59 63 60 58 56
71 63 58 53 69 62 57 52 60 55 51 58 54 51 56 53 50 48
65 57 50 45 64 56 50 45 54 49 45 52 48 44 50 47 43 42
60 51 44 40 59 50 44 39 49 43 39 47 42 39 46 41 38 37
56 46 40 35 55 45 39 35 44 39 34 43 38 34 42 37 34 32
52 42 36 31 51 41 35 31 40 35 31 39 34 30 38 34 30 29
49 38 32 28 47 38 32 28 37 31 28 36 31 27 35 31 27 26
45 35 29 25 44 35 29 25 34 29 25 33 28 25 32 28 25 23
43 33 27 23 42 32 27 23 32 26 23 31 26 23 30 26 22 21
1394 24.5 31.7
2269 39.8 51.6
3729 65.4 84.8
4398 77.1 100.0
4398 77.1 100.0
L u m i n a n c e D a t a
Average Average Average
Angle 0-Deg 45-Deg 90-Deg
in Deg cd/sm cd/sm cd/sm
45 3789 4090 4546
55 2992 3227 3658
65 2298 2100 2584
75 2183 1819 2546
85 2531 2654 2778
C o e f f i c i e n t s o f U t i l i z a t i o n
Effective floor cavity reflectance 20%
rc 80% 70% 50% 30% 10% 0%
rw 70 50 30 10 70 50 30 10 50 30 10 50 30 10 50 30 10 0
RCR
0
1
2
3
4
5
6
7
8
9
10
Z o n a l L u m e n S u m m a r y
Zone Lumens %Lamp %Fixture
0-30
0-40
0-60
0-90
0-180
C a n d e l a
Angle Along II 45° Across ⊥
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
2GR8-217A
Electronic Ballast
(2) F32T8 lamps
1350 lumens
Spacing criterion:
(II) 1.2 x mounting
height, (⊥) 1.4 x
mounting height
Efficiency 75.1%
Test Report:
2GR8-217A.IES
LER = FL-60
Yearly Cost of 1000
lumens, 3000 hrs at
.08 KWH = $4.00
795 795 795
794 792 796
782 785 794
763 774 790
734 756 781
699 731 765
652 697 734
597 648 695
528 586 646
449 503 574
363 413 478
287 325 371
220 235 273
165 155 189
123 104 143
96 81 112
70 68 82
38 39 40
0 0 0
89 89 89 89 87 87 87 87 83 83 83 80 80 80 77 77 77 75
82 79 76 73 80 77 74 72 74 72 70 71 69 68 68 67 66 64
75 70 65 61 73 68 64 60 66 62 59 63 60 57 61 58 56 54
69 62 56 51 67 61 55 51 58 54 50 56 52 49 54 51 48 47
64 55 49 44 62 54 48 44 52 47 43 51 46 43 49 45 42 40
59 49 43 38 57 49 43 38 47 42 38 46 41 37 44 40 37 35
54 45 38 34 53 44 38 34 43 37 33 41 37 33 40 36 33 31
50 41 34 30 49 40 34 30 39 34 30 38 33 29 37 33 29 28
47 37 31 27 46 37 31 27 36 30 27 35 30 26 34 30 26 25
44 34 28 24 43 34 28 24 33 28 24 32 27 24 31 27 24 22
41 32 26 22 40 31 26 22 30 25 22 30 25 22 29 25 22 20
631 23.4 31.1
1035 38.3 51.0
1718 63.6 84.7
2027 75.1 100.0
2027 75.1 100.0
L u m i n a n c e D a t a
Average Average Average
Angle 0-Deg 45-Deg 90-Deg
in Deg cd/sm cd/sm cd/sm
45 2231 2499 2852
55 1758 1991 2273
65 1372 1289 1571
75 1303 1100 1520
85 1532 1572 1613