Lightolier MBS2GPW1FT User Manual

Mini-Beam 2' x 2' Recessed Fluorescent MBS2GPW1FT

Page 1 of 2 Direct/Indirect, Static, 1 Lamp, TT5, 55, 50 or 40 Watt

Features

•

Direct/indirect lamp shield appearance with soft contoured
interior.

• Four inch wide perforated mesh lamp shield with white acrylic
overlay.

• 66.4% efficient.

• Only 5-1/2" deep.

• Same fixture fits both G and T ceiling types.

• Fits flush to face of slot grid (T) ceiling types.

• Lamp shield hinges from either side.

• Hinged external ballast housing compartment.

• Can be continuous row mounted.

• Wiring access plate standard.

• 4 hold-down clips standard.

• Housing is 20 gauge steel, meets NYC Code requirements.

• Optional DALI ballast accepts digital dimming commands from
computers, scene controllers and automatic control devices.

Job Information Type:

Job Name:

Cat. No.:

Lamp(s):

Volts/Ballast:

Lightolier a Genlyte Thomas Company www.lightolier.com

Technical Information: [phone] • Fax [phone]
631 Airport Road, Fall River, MA 02720 • [phone] • Fax [phone]
We reserve the right to change details of design, materials and finish.
Copyright 2004 Lightolier Section 5/Folio M20-15 Rev. A

5/04

Hinged external ballast housing
compartment

Exposed t-grid ceiling

Exposed slot t-grid ceiling

Acoustical
material
by others

Exposed T-bar
by others

1-1/2"
max.

Acoustical
material
by others

15/16"

24"

1-7/8"
max.

Exposed T-bar
by others

9/16"

24"

Hold-down clips

Mounting Methods Dimensions

Hinged external
ballast housing
compartment

Ballast

2" x 2" access plate
with two K.O.’s (7/8" dia.)

3-1/2"

(89mm)

24" (610mm)

Features

Hinged external ballast housing compartment

24" (610mm)

5-1/2"

(139mm)

4" (102mm)

Mini-Beam 2' x 2' Recessed Fluorescent MBS2GPW1FT

Page 2 of 2 Direct/Indirect, Static, 1 Lamp, TT5, 55, 50 or 40 Watt

Lightolier a Genlyte Thomas Company www.lightolier.com

Technical Information: [phone] • Fax [phone]
631 Airport Road, Fall River, MA 02720 • [phone] • Fax [phone]
We reserve the right to change details of design, materials and finish.
Copyright 2004 Lightolier Section5/Folio M20-15

Job Information Type:

Ordering Information

Explanation of Catalog Number. Example: MBS2GPW1FT120BFGLR

Options/Accessories

Fusing: Internal fast-blow fusing. Suffix: GLR.

Internal slow-blow fusing. Suffix: GMF.

Electrical/Wiring Options: Consult factory.

Specifications

Performance: In an installation of 1 lamp 55W luminaires in a room cavity of 1,

with reflectance of 80% ceiling, 50% walls, 20% floor, the C.U. shall not be less
than .69. To reduce glare the average brightness at 65° shall not exceed 3804
candelas per square meter. To control veiling reflections, luminaire output in the
30°-90° zone shall not be less than 74.8%.

Materials: Housing is die-formed 20 gauge steel.
Finish: Chassis exterior–baked white acrylic enamel. Reflector–baked flat

white acrylic enamel, minimum 86% reflectance. Phosphate undercoating.

Lamp Shield–baked flat white 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 and ULc Listed.

Photometry

Model No. MBS2GPW1FT120BF

MB

Mini-Beam

Direct/Indirect

Recessed

with Perforated

Mesh Shield

2

Fixture

Width

G

Ceiling Type:

Fits both

Standard Grid

and

Slot Grid

P

Perforated

Lamp Shield

W

White

Reflector

Voltage:

120 or 277

Options:

Add appropriate
suffix to catalog

no, ie: (GLR)

Ballast:

BF = 55 watt TT5

<10THD RS

BE = 50 watt TT5

<20THD RS

SB = 40 watt TT5

<20THD IS

LER = FL - 47.8 IW - 60.9 BF - 0.92
Comparative yearly lighting energy cost per 1000 lumens = $5.02

S

Body Style:

S = Static

1

Lamp

Quantity

FT

Lamp:

(By others)

FT = TT5

For Local 3 Manufacturing, substitute for . Example: MNS2GPW1FT120BFGLR .

MN

MN

For Local 3

Manufacturing

MB

THIS REPORT IS BASED ON PUBLISHED INDUSTRY PROCEDURES • FIELD PERFORMANCE MAY VARY FROM LABORATORY PERFORMANCE.

G2004038
MBS2GPW1FT120BF

coefficients of utilization — zonal cavity method (effective floor cavity reflectance 0.20)

RF 20 20 20
RC 80 50 30

RW 70 50 30 50 30 10 50 30 10

1726966 646260 626058
2655955 565249 545148
3595246 494441 474340
4544640 433834 423734
5504135 393329 373329
6463730 353026 342925
7423327 312623 302622
8393024 292420 282320
9372822 262218 262118

10 34 25 20 24 20 16 24 19 16

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 56 64 75 86 46 55 69 83

20 30 53 57 64 74 41 44 52 66
20 40 53 55 60 66 39 41 45 53
20 60 53 55 57 61 38 39 41 46

30 20 55 62 72 83 49 56 68 80
30 30 51 55 61 70 43 45 51 63
30 40 51 52 56 62 40 41 43 50
30 60 51 52 53 57 38 39 39 43
30 80 52 53 52 56 39 39 38 41

40 20 56 61 70 80 52 58 68 79
40 30 52 54 59 68 45 47 52 63
40 40 51 52 54 60 42 43 44 50
40 60 51 51 51 55 40 41 40 43
40 80 52 52 51 53 40 40 38 40
40 100 53 53 51 53 41 40 38 39

60 30 53 55 58 66 48 50 53 63
60 40 52 52 53 58 45 45 45 50
60 60 51 51 50 53 42 42 40 43
60 80 52 51 49 51 42 41 38 40
60 100 53 52 50 51 42 41 38 39

100 40 55 55 54 58 50 50 49 54
100 60 54 53 51 53 47 46 44 46
100 80 55 53 50 51 46 45 41 43
100 100 55 54 50 50 47 44 40 40

room cavity ratio

luminaries lengthwise

luminaries crosswise