Parabaffle (mlb), Photometry, Ordering information – Lightolier 340 User Manual
Page 2: Options & accessories, Specifications, Specifications (continued), Job information type, Lightolier
PHOTOMETRY
MODEL NO. MLB2S78LS340120O3
coefficients of utilization — zonal cavity method
RF
20
20
20
RC
80
50
30
RW
70
50
30
50
30
10
50
30
10
1
69
67
65
63
61
60
60
59
58
2
64
60
57
57
55
53
55
53
51
3
60
54
50
52
49
46
50
47
45
4
55
49
44
47
43
40
45
42
39
5
51
44
39
42
38
35
41
37
34
6
46
39
34
37
33
30
36
33
30
7
43
35
30
34
29
26
33
29
26
8
39
31
26
30
26
22
29
25
22
9
36
28
23
27
22
19
26
22
19
10
33
25
20
24
20
17
23
20
17
visual comfort probability
room size
ceiling height
ceiling height
W
L
8.5
10.0
13.0
16.0
8.5
10.0
13.0
16.0
20
20
81
79
73
81
80
74
65
74
20
30
81
79
78
75
78
75
72
67
20
40
81
79
78
79
78
75
72
70
20
60
82
79
78
79
78
75
73
68
30
20
81
82
73
77
78
78
68
72
30
30
81
82
77
73
78
79
74
67
30
40
81
82
77
76
78
79
75
67
30
60
82
83
77
74
78
79
75
68
30
80
82
83
77
75
78
79
75
68
40
20
81
82
76
77
78
78
70
73
40
30
81
82
79
73
78
79
76
69
40
40
82
83
79
74
78
79
76
69
40
60
82
83
79
74
78
79
75
69
40
80
82
83
79
74
78
79
75
69
40
100
82
83
79
75
79
79
75
69
60
30
81
83
79
74
78
79
76
72
60
40
82
83
79
75
78
79
75
72
60
60
82
83
79
76
79
79
75
72
60
80
82
83
79
76
79
79
75
72
60
100
82
83
79
76
79
79
75
72
100
40
82
83
79
76
79
79
75
72
100
60
82
83
79
76
79
79
75
72
100
80
82
83
79
76
79
79
75
72
100
100
82
83
79
76
79
79
75
72
room cavity ratio
luminaries lengthwise
luminaries crosswise
ORDERING INFORMATION
Explanation of Catalog Number. Example: MLB2S78LS340120O3GLR
ML
PARABAFFLE
PARABOLIC:
1 1/2" Deep
Precision
Contoured Pre-
anodized
Aluminum
Louver
B
BODY STYLE:
Surface Box
2
FIXTURE
WIDTH
S
CEILING
TYPE:
S=Surface
78
NUMBER OF
CELLS
L
LOUVER FINISH*:
L=Low-iridescence
semi-specular
(standard)
P=Low-iridescence
specular
S
WHITE
REFLECTOR
LAMP
QUANTITY:
2, 3 or 4 Lamps
40
LAMP/
FIXTURE
LENGTH:
(Nominal 48")
VOLTAGE:
120 or 277
BALLAST TYPE:
LE=Magnetic (T12)
OC=Magnetic (T8)
SS=Electronic (T12)
S3=1-3 Lamp Elec. (T12)
SO=Electronic (T8)
O3=1-3 Lamp Elec. (T8)
O4=1-4 Lamp Elec. (T8)
DIM=Dimming (T12)
PS=LOL Power Spec
T8 Dimming
Ballast
OPTIONS:
Add
appro-
priate
suffix to
catalog
no., ie:
(GLR)
OPTIONS & ACCESSORIES
FUSING: Internal fast-blow fusing. SUFFIX: GLR.
Internal slow-blow fusing. SUFFIX: GMF.
RADIO INTERFERENCE FILTER: 120 or 277 volt, 50 or 60 Hz. One per fixture
is standard. SUFFIX: RF.
ELECTRICAL/WIRING OPTIONS: Consult factory.
LOW DENSITY CEILINGS: DSM
STEM AND CANOPY SETS: Suspends fixture 6", 12", 18" or 24" from surface
(four per fixture is recommended). Catalog Number ASC6 CSP (6"),
ASC12 CSP (12"), ASC18 CSP (18"), ASC24 CSP (24").
SPECIFICATIONS
PERFORMANCE: In an installation of 3 lamp 32W luminaires in a room cavity
ratio of 1, with a reflectance of 80% ceiling, 50% wall, 20% floor, the C.U.
shall not be less than .67. To prevent glare the VCP shall be not less than 79
either lengthwise or cross wise (at 100fc level) and the average brightness at
65° shall not exceed 97 footlamberts. To control veiling reflections, luminaire
output in the 30°-90° zone shall be not less than 69.3%.
SPECIFICATIONS (continued)
MATERIALS: Chassis parts are die-formed 20 gauge cold rolled steel, weld-
ed for rigidity.
LOUVER: pre-anodized aluminum (Coilzak® or equal).
FINISH: Louver—low iridescence, semi-specular pre-anodized vertical grain
reflector sheet. Cavity—white baked acrylic enamel minimum 86%
reflectance. Phosphate undercoating. Chassis exterior—white baked acrylic
enamel.
ELECTRICAL: Thermally protected class “P” ballast C.B.M. approved, non PCB.
If K.O. is within 3" of ballast, use wire suitable for at least 90°.
LABELS: I.B.E.W., UL, ULc Listed.
*Consult factory for availability of louver finishes.
MLB2S78LS340120SO
F32T8
2850
Lightolier
a Genlyte Thomas Company
www.lightolier.com
Technical Information: (978) 657-7600 • Fax (978) 658-0595
631 Airport Road, Fall River, MA 02720 • (508) 679-8131 • Fax (508) 674-4710
We reserve the right to change details of design, materials and finish.
© 2002 Genlyte Thomas Group LLC (Lightolier Division)
A0902
SECTION 2/Folio G20-38
Job Information
Type:
PARABAFFLE (MLB)
MLB SERIES 240/340/440
Page 2 of 2
2'x4' SURFACE BOX FLUORESCENT, 1 1/2" DEEP, 78 CELL PARABOLIC LOUVER
2, 3, or 4 LAMP T8/T12