Specification
LB-N
FLUORESCENT: One Lithonia Way Conyers, GA 30012 Phone: 800-858-7763 Fax: 770-929-8789 www.lithonia.com © 2000-2014 Acuity Brands Lighting, Inc. All rights reserved. Rev. 03/14/14
DIMENSIONS
Inches (centimeters). Subject to change without notice.
MOUNTING DATA
For unit or row installation, surface or stem mounting. Stem mounting not available on TLB units.
Individual installation — Two single-stem hangers required.
Row installation — One hanger per xture plus one per row required.
See ACCESSORIES below for hanging devices.
LB Low-Prole Wraparound, Narrow Body
PHOTOMETRICS
Calculated using the zonal cavity method in accordance with IESNA LM41 procedure. Floor reectances are 20%. Lamp congurations shown are typical. Full photometric data on these and other congurations available upon request.
A = 1/4 x 1/2 (.635 x 1.27) Oval Hole
B = 11/16 (1.74) Dia. K.O.
C = 7/8 (2.22) Dia. K.O.
Test # LTL 19928 – LB 2 28T5 GEB95
Coecient of Utilization - Zonal Cavity Method
Eective Floor Cavity Reectance: 20%
80% 70% 50% 30% 10% 0%
70 50 30 0 70 50 30 0 50 30 20 50 30 20 50 30 20 0
0 1.03 1.03 1.03 1.03 1.00 1.00 1.00 .77 .93 .93 .93 .86 .86 .86 .80 .80 .80 .77
1 .94 .90 .86 .82 .90 .86 .83 .65 .81 .78 .75 .75 .73 .71 .70 .68 .67 .64
2 .86 .79 .73 .68 .83 .76 .71 .55 .71 .67 .63 .66 .63 .60 .62 .59 .57 .54
3 .79 .70 .63 .57 .76 .67 .61 .48 .63 .58 .54 .59 .55 .51 .56 .52 .49 .46
4 .72 .62 .55 .49 .70 .60 .53 .42 .57 .51 .46 .53 .48 .44 .50 .46 .43 .40
5 .67 .56 .48 .43 .64 .54 .47 .37 .51 .45 .40 .48 .43 .39 .45 .41 .37 .35
6 .62 .51 .43 .37 .59 .49 .42 .33 .46 .40 .36 .44 .38 .34 .41 .37 .33 .31
7 .57 .46 .39 .33 .55 .45 .38 .29 .42 .36 .32 .40 .35 .31 .38 .33 .30 .28
8 .54 .42 .35 .30 .52 .41 .34 .26 .39 .33 .28 .37 .32 .28 .35 .30 .27 .25
9 .50 .39 .32 .27 .48 .38 .31 .24 .36 .30 .26 .34 .29 .25 .32 .28 .24 .23
10 .47 .36 .29 .24 .45 .35 .28 .22 .33 .27 .23 .32 .26 .23 .30 .25 .22 .21
Zonal Lumens Summary
Zone Lumens %Lamp %Fixture
0-30 1,239.0 23.8 26.7
0-40 2,020.6 38.9 43.6
0-60 3,264.4 62.8 70.4
60-90 765.6 14.7 16.5
70-100 626.7 12.1 13.5
90-120 421.8 8.1 9.1
0-90 4,030.0 77.5 86.9
90-180 607.0 11.7 13.1
0-180 4,637.0 89.2 100
A
B
C
1-3/4
(4.4)
1-3/4
(4.4)
4-1/4
(10.8)
22-1/2
(57.1)
2-1/8
(5.4)
A
A
B
C
1-3/4
(4.4)
1-3/4
(4.4)
10-5/8
(27.0)
24
(61.0)
2-1/8
(5.4)
A
A
B
C
C
1-7/8
(4.4)
3-1/2
(8.9)
46-1/2
(118.1)
23
(58.4)
2-5/8
(6.7)
24
(61.0)
48
(122.0)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
A
B
C
C
1-7/8
(4.4)
3-1/2
(8.9)
2-5/8
(6.7)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
23
(58.4)
92-1/4
(234.3)
1-7/8
(4.8)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
23
(58.4)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
96
(243.8)
3-5/8
(9.2)
3-5/8
(9.2)
1-7/8
(4.8)
1-7/8
(4.8)
2-5/8
(6.7)
2-5/8
(6.7)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
34
(86.4)
34
(86.4)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
3-5/8
(9.2)
3-5/8
(9.2)
1-7/8
(4.8)
2-5/8
(6.7)
2-5/8
(6.7)
A
B
C
C
1-7/8
(4.4)
3-1/2
(8.9)
46-1/2
(118.1)
23
(58.4)
2-5/8
(6.7)
24
(61.0)
48
(122.0)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
A
B
C
C
1-7/8
(4.4)
3-1/2
(8.9)
2-5/8
(6.7)
1-7/8
(4.8)
2-5/8
(6.7)
3-1/2
(8.9)
RCC%
RW%
RCR
Test # BAL16520 - LB 2 32 MVOLT
Coefficients of Utilization
%02fp
pc 80% 50% 30% 10% 0%
pw 50% 30% 10% 50% 30% 10% 50% 30% 10% 50% 30% 10
%0
%
0
1
2
3
4
5
6
7
8
9
10
103
89
79
70
62
56
50
46
42
38
35
103
86
73
63
55
48
43
38
35
31
29
103
82
68
57
49
42
37
33
30
27
24
92
80
71
63
56
51
46
42
39
35
33
92
77
66
58
51
45
40
36
32
30
27
92
75
63
53
46
40
35
31
28
25
23
86
75
66
59
53
48
43
40
36
34
31
86
73
63
54
48
43
38
34
31
28
26
86
70
59
51
44
39
34
30
27
25
23
80
70
62
55
50
45
41
38
35
32
30
80
68
59
52
46
41
36
33
30
27
25
80
66
56
48
42
37
33
29
26
24
22
77
64
54
46
40
35
31
28
25
22
20
RCR
Zonal Lumen Summary
Zone Lumens % Lamp % Fixture
0° - 30°
0° - 40°
0° - 60°
0° - 90°
90° - 180°
0° - 180°
1383.1
2263.3
3676.3
4533.6
722.4
5256.0
23.4
38.4
62.3
76.8
12.2
89.1
26.3
43.1
69.9
86.3
13.7
100.0