Lightolier MBS2GHP228WA User Manual
Mini-Beam HP 2'x4' Recessed Fluorescent MBS2GHP228WA
Page 1 of 2 Direct/Indirect, Static, 2 Lamp, Linear T5, 28 Watt
Features
• Can provide 52.4 maintained footcandles of balanced brightness
illumination at only 0.69 watts per square foot.
• 90.7% efficient (2 lamp, 28 watt).
• Watts per square foot are 46% below LEED base level.
•
Direct/indirect appearance with soft contoured interior.
• Four inch wide prismatic lens.
• 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.
Job Information Type:
Job Name:
Cat. No.:
Lamp(s):
Volts/Ballast:
10/05
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
Hinged external ballast housing compartment
24" (610mm)
2" x 2" access plate
with two K.O.’s (7/8" dia.)
2-5/8"
(67mm)
5-1/2"
(139mm)
48" (1219mm)
Features
4" (102mm)
Lightolier a Genlyte 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.
© 2005 a Genlyte company
Section 5/Folio M20-26
Mini-Beam HP 2'x4' Recessed Fluorescent MBS2GHP228WA
Page 2 of 2 Direct/Indirect, Static, 2 Lamp, Linear T5, 28 Watt
Job Information Type:
Ordering Information
Explanation of Catalog Number. Example: MBS2GHP228120WA
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 2 lamps 28W luminaires in a room cavity of
1, with reflectance of 80% ceiling, 50% walls, 20% floor, the C.U. shall not be
less than 0.93. To control veiling reflections, luminaire output in the 30°-90°
zone shall not be less than 75.4%.
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–Prismatic virgin acrylic lens.
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.
Mini-Beam
Direct/Indirect
Recessed
2
Fixture
Width
G
Ceiling Type:
Fits both
Standard Grid
and
Slot Grid
HP
High
Performance
Prismatic
Lens
Voltage:
120 or 277
UNV=120-277
WA
Options:
Add appropriate
suffix to catalog
no, ie: (GLR)
S
Body Style:
S = Static
Lamp
Quantity
1=1 Lamp
2=2 Lamp
28
Lamp Quantity:
(By others)
28 = 28 Watt T5
MB
Lightolier a Genlyte 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.
© 2005 a Genlyte company Section 5/Folio M20-26
0.0 45.0 90.0 FLUX
0 1458 1458 1458
5 1446 1471 1490 141
15 1394 1504 1565 422
25 1299 1471 1522 665
35 1164 1350 1376 821
45 989 1160 1245 882
55 776 933 1047 829
65 522 673 779 660
75 261 446 530 441
85 51 131 142 128
90 000
Model No. MBS2GHP228120WA
LER = FP - 75.4 IW - 55.4 BF - 0.93
Comparative yearly lighting energy cost per
1000 lumens = $3.18
Fixture: MBS2GHP228120WA
Quantity: 6 Rows of 7 Fixtures
Efficiency: 90.7%
Room Size: 60' x 56' x 9'
Reflectance: 80/50/20
Lumens: T5 Lamp: 2750
Ballast Factor: 0.93
Average Maint. fc: 52.4
Watts/Square Foot: 0.69
CANDELA DISTRIBUTION
0
AVERAGE AVERAGE AVERAGE AVERAGE
IN DEG. 0-DEG. 45-DEG. 90-DEG.
45 2000. 2345. 2517.
55 1934. 2325. 2610.
65 1766. 2277. 2635.
75 1442. 2464. 2928.
85 837. 2149. 2329.
LUMINANCE DATA IN CANDELA/SQ. METER
COEFFICIENTS OF UTILIZATION –
ZONAL CAVITY METHOD. EFFECTIVE
FLOOR CAVITY REFLECTANCE 0.20
0
RC 80 50 30
RW 70 50 30 50 30 10 50 30 10
1 989389878481848179
2 898174767066736865
3 807062666055645854
4 736254585246565046
5 675547524540504439
6 624941474035453934
7 574536433530413530
8 534133393227383127
9 503730362924352924
10 47 34 27 33 26 22 32 26 22
ZONE LUMENS % LAMP % FIXT
00-030 1229 22.3 24.6
00-040 2050 37.3 41.1
00-060 3760 68.4 75.4
00-090 4990 90.7 100.0
90-180 0000 0.0 000.0
00-180 4990 90.7 100.0
ZONAL LUMEN SUMMARY
60'
56'
Report Number: G2005263
Catalog Number: MBS2GHP228120WA
Lamp: FP28/835
Luminaire: MBS with prismatic lens
Ballast: WA Energy Smart
Report is based on 2750 lumens per lamp.
Efficiency: 90.7%
CIE Type-Direct-Indirect
Plane: 0-Deg. 90-Deg.
Spacing Criteria: 1.3 1.4
Shielding Angles: 90 90
Plane: 0-Deg. 90-Deg.
Luminous Length: 46.920 22.920
MBS vs Typical troffer with Magnetic ballast
and 3 T12 34 watt lamps.
HOURS
INPUT COST/KWH BURNED YEARLY
WATT .10¢/1000 PER YEAR COST
148 .000 6570 $97.24
56 .000 6570 $36.19
MBS Savings per fixture $60.45
Ballast Type:
Energy Smart
WA = Linear T5 Instant
Start Less than
10 THD 56 Input
Watts 0.93
Ballast Factor
Other Ballast Options:
<20THD < 10THD
1-2 Lamp 28W Elec. T5 –P
I †
1-2 Lamp 28W Elec. T5 – †PG ††
††Instant Start (120V or 277V only)
††Program Rapid Start (UNV only)
Standard Mini-Beam
M3
For NYC Code – Local 3 Manufactured
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