Lightolier MLB SERIES Page 2 of, Photometry, Ordering Information, Options & Accessories, Type

SECTION 2/Folio G20-36

	PARABAFFLE (MLB) MLB SERIES 2U/3U
Page 2 of 2	2'x2' SURFACE BOX FLUORESCENT, 1 1/2" DEEP, 36 CELL PARABOLIC LOUVER
	2-6"U LAMP T8/T12, 3-1.6U LAMP T8 OR TT5

PHOTOMETRY MODEL NO. MLB2S36LS2U6120SO

MLB2S36LS2U6120SO

31W/U6/T82850

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	64	62	60	58	57	56	56	55	54
ratio	2	59	56	52	52	50	48	51	49	47
	3	55	50	46	47	44	41	46	43	41
cavity	4	50	44	40	42	39	36	41	38	35
	5	47	40	35	38	34	31	37	34	31
room	6	43	36	31	35	31	28	34	30	27
	7	40	33	28	31	27	25	31	27	24
	8	37	30	25	29	25	22	28	24	22
	9	35	27	23	26	23	20	26	22	20
	10	33	25	21	24	21	18	24	20	18

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		82	76	71	77		79	71	64	71
20	30		82	78	74	72		79	73	68	65
20	40		82	78	77	75		79	74	73	68
20	60		85	78	77	75		83	74	71	68
30	20		85	80	72	74		81	76	67	70
30	30		85	81	75	70		81	78	70	65
30	40		85	81	77	73		81	78	72	68
30	60		87	81	77	73		84	78	72	68
30	80	lengthwise	87	81	76	74	crosswise	64	78	72	68
40	40		85	81	79	74		81	78	75	70
40	20		85	80	76	74		81	76	71	72
40	30	luminaries	85	81	78	71	luminaries	81	78	74	67
40	60		87	81	79	74		83	78	76	70
40	80		87	81	79	74		83	78	76	70
40	100		87	80	79	74		83	78	76	70
60	30		85	81	79	74		81	78	74	70
60	40		86	81	79	76		81	78	75	73
60	60		87	80	80	76		83	78	76	73
60	80		87	80	80	76		83	78	76	73
60	100		87	81	80	76		83	78	76	73
100	40		86	80	80	76		81	78	76	73
100	60		87	80	80	76		83	78	76	73
100	80		87	80	80	77		83	78	76	73
100	100		87	81	80	77		83	78	76	74

ORDERING INFORMATION

Explanation of Catalog Number. Example: MLB2S36LS2U6120SOGLR

ML		B	2
PARABAFFLE			FIXTURE
PARABOLIC:			WIDTH
1 1/2" Deep
Precision
Contoured Pre-
anodized
	BODY STYLE:
Aluminum
		Surface Box
Louver

*Consult factory for availability of louver finishes.

S

36

L

S

NUMBER OF

WHITE

LAMP/

BALLAST TYPE:

CELLS

REFLECTOR

FIXTURE

LE=Magnetic (T12)

LENGTH:

OC=Magnetic (T8)

(Nominal 24")

SS=Electronic (T12)

U4=6" UT12 or

S3=1-3 Lamp Elec. (T12)

U1.6 T8 or TT5

SO=Electronic (T8)

CEILING

LOUVER FINISH*:

LAMP

U6=6" UT8

VOLTAGE: O3=1-3 Lamp Elec. (T8)

OPTIONS:

TYPE:

L=Low-iridescence

QUANTITY:

(Magnetic T8 or

120 or 277

DIM=Dimming (T12)

Add appro-

S=Surface

semi-specular

2 or 3 Lamps

Electronic T8

PS=LOL Power Spec

priate suffix

(standard)

to catalog

Ballast Only)

T8 Dimming

P=Low-iridescence

no., ie: (GLR)

Ballast

specular

PB=LOL Power

Spec TT5 Dimming

Ballast

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 2 lamp 31W 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 .62. To prevent glare the VCP shall be not less than 83 either lengthwise or cross wise (at 100fc level) and the average brightness at 65° shall not exceed 328 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, welded for rigidity.

LOUVER: pre-anodized aluminum (Coilzak® or equal).

FINISH: Louver—low iridescence, semi-specularpre-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.

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.

© 2002 Genlyte Thomas Group LLC (Lightolier Division) A0902