Lightolier MBS2GPW254 Page 2 of, Photometry, Ordering Information, Options/Accessories, Type

Mini-Beam 2' x 4' Recessed Fluorescent MBS2GPW254

Page 2 of 2 Direct/Indirect, Static, 2 Lamp, Linear T5, 54 Watt or 28 Watt

Photometry Model No. MBS2GPW254120PG

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

LER = FL - 60.5			IW - 120.2			BF - 1.00
Comparative yearly lighting energy cost per 1000 lumens = $3.96
	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
		1	77	74		70		69	67	64		66		64	62
	ratio	2	70	64		59		60	56	52		57		54	51
		3	63	56		49		52	47	43		50		46	43
	cavity	4	58	49		42		46	41	37		44		40	36
		5	53	44		37		41	36	32		40		35	31
	room	6	49	39		33		37	32	27		36		31	27
		7	45	35		29		34	28	24		33		28	24
		8	42	32		26		31	25	22		30		25	21
		9	39	30		24		28	23	19		28		23	19
		10	37	27		21		26	21	18		25		21	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		36	44	57		71		28	36	51		67
20			30		31	36	43		55		24	26	33		47
20			40		30	32	37		44		23	24	26		33
	20		60		29	31	34		39		23	23	24		27
30			20		35	42	53		67		30	37	49		64
30			30		30	34	40		51		25	27	32		44
30			40		28	30	34		41		24	24	25		31
30			60		28	29	31		35		23	23	22		25
	30		80	lengthwise	29	30	29		33	crosswise	24	24	22		24
40			40		29	30	33		39		26	26	26		31
40			20		36	42	51		64		33	39	49		63
40			30	luminaries	31	33	38		48	luminaries	27	29	33		44
40			60		29	29	29		33		25	25	23		25
40			80		30	29	28		31		26	25	22		24
	40		100		31	30	28		31		27	26	23		23
60			30		33	35	38		47		30	31	34		44
60			40		31	31	32		37		28	27	26		32
60			60		30	29	28		32		27	26	23		25
60			80		31	30	27		30		27	26	23		24
	60		100		32	31	23		29		28	26	23		23
100			40		35	35	34		38		33	32	30		35
100			60		34	33	30		32		31	30	26		28
100			80		35	33	29		30		31	29	25		26
	100		100		36	33	29		29		32	29	25		25

Ordering Information

Explanation of Catalog Number. Example: MBS2GPW254120PGGLR

MB S 2 G P

W

2

	Body Style:
Mini-Beam		Fixture	Ceiling Type:	Perforated
Direct/Indirect	S = Static	Width	Fits both	Lamp Shield
Recessed			Standard Grid
with Perforated			and
			Slot Grid

White

Reflector

Lamp		Voltage:
Quantity		120 or 277
	Lamp Quantity:

Ballast:

Options:

Add appropriate suffix to catalog no, ie: (GLR)

Mesh Shield

MN

For Local 3

Manufacturing

For Local 3 Manufacturing, substitute MN for MB . Example: MNS2GPW154120PGGLR .

Options/Accessories

Fusing: Internal fast-blow fusing. Suffix: GLR.Internal slow-blow fusing. Suffix: GMF.Electrical/Wiring Options: Consult factory.

(By others)

54 = HO/T5 54 Watt

28 = 28 Watt T5

PI = Linear T5 Instant Start Less than 10 THD

PG = Programmed Start

Less than 10 THD

DA = DALI digital addressable dimming

Specifications

Performance: In an installation of 2 lamps 54W luminaires in a room cavity of 1, with reflectance of 80% ceiling, 50% walls, 20% floor, the C.U. shall not be less than .74. To reduce glare the average brightness at 65° shall not exceed 8112 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.

Job Information	Type:
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.
Copyright 2004 Lightolier		Section5/Folio M20-22 Rev. A