Lightolier MBS2GHP228WA Page 2 of, Ordering Information, Options/Accessories, Specifications

Mini-Beam HP 2'x4' Recessed Fluorescent MBS2GHP228WA

Page 2 of 2 Direct/Indirect, Static, 2 Lamp, Linear T5, 28 Watt

Model No. MBS2GHP228120WA

LER = FP - 75.4 IW - 55.4 BF - 0.93 Comparative yearly lighting energy cost per

1000 lumens = $3.18 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
COEFFICIENTS OF UTILIZATION –
ZONAL CAVITY METHOD. EFFECTIVE
FLOOR CAVITY REFLECTANCE 0.200
RC		80			50			30
RW	70	50	30	50	30	10	50	30	10
1	98	93	89	87	84	81	84	81	79
2	89	81	74	76	70	66	73	68	65
3	80	70	62	66	60	55	64	58	54

CANDELA DISTRIBUTION0
	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	0	0	0

60'

56'

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

4	73	62	54	58	52	46	56	50	46
5	67	55	47	52	45	40	50	44	39
6	62	49	41	47	40	35	45	39	34
7	57	45	36	43	35	30	41	35	30
8	53	41	33	39	32	27	38	31	27
9	50	37	30	36	29	24	35	29	24
10	47	34	27	33	26	22	32	26	22

LUMINANCE DATA IN CANDELA/SQ. METER

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.

ZONAL LUMEN SUMMARY

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

		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

MBS vs Typical troffer with Magnetic ballast

and 3 T12 34 watt lamps.

Ordering Information

Explanation of Catalog Number. Example: MBS2GHP228120WA

S 2 G HP

28 WA

	Mini-Beam	Body Style:	Fixture	Ceiling Type:	High
Direct/Indirect		S = Static	Width	Fits both	Performance
	Recessed			Standard Grid	Prismatic
				and	Lens
	MB	Standard Mini-Beam		Slot Grid
	M3	For NYC Code – Local 3 Manufactured

Options/Accessories

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

Internal slow-blow fusing. Suffix: GMF.

Electrical/Wiring Options: Consult factory.

Lamp

Quantity

1=1 Lamp

2=2 Lamp

Lamp Quantity:

(By others)

28 = 28 Watt T5

Voltage:		Options:
120 or 277		Add appropriate
UNV=120-277		suffix to catalog
Ballast Type:		no, ie: (GLR)
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	–	PI †
1-2 Lamp 28W Elec. T5	–	†PG ††

††Instant Start (120V or 277V only) ††Program Rapid Start (UNV only)

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.

Job Information	Type:
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