Lightolier PRA2GRFVA3FT Page 2 of, Photometry, Ordering Information, Options & Accessories, Type

Section 1A/Folio E20-34

	PRISMALYTE plus PRA2GRFVA3FT or 2FT
Page 2 of 2	2'x2' RECESSED FLUORESCENT, FLOATING LENS FRAME WITH BLACK REVEAL
	STATIC OR AIR SUPPLY/RETURN, 2 OR 3 LAMP, TWIN TUBE T5

PHOTOMETRY

MODEL NO. PRA2GRFVA3FT									Luminaire Efficacy Rating
									LER-42.7 Watts-98.0 BF-0.88
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	83	80		77		75	73	71			72	70	69
ratio	2	76	71		66		67	63	60			64	61	59
	3	70	63		58		60	55	52			58	54	51
cavity	4	65	57		51		54	49	45			52	48	44
	5	60	51		45		49	44	40			47	43	39
room	6	56	46		40		44	39	35			43	38	35
	7	52	42		36		41	35	31			39	35	31
	8	48	39		33		37	32	28			36	32	28
	9	45	36		30		34	29	26			34	29	26
	10	43	33		27		32	27	23			31	27	23
visual comfort probability				(rated lumens per lamp 3150.)
	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		44	47	53	60				42	46	51	58
20		30		37	40	44	49				34	38	42	47
20		40		34	36	40	43				31	33	37	41
20		60		31	33	35	39				28	30	32	36
30		20		45	49	53	58				44	48	51	57
30		30		38	41	44	48				35	39	42	46
30		40		34	36	39	42				31	34	37	40
30		60		31	33	34	37				28	30	31	35
30		80	lengthwise	31	32	32	34			crosswise	27	29	29	32
40		40		35	37	40	42				32	35	38	40
40		20		47	51	54	58				46	50	53	58
40		30		39	42	45	49				37	41	44	47
40		60	luminaries	32	34	34	37			luminaries	29	31	32	35
40		80		31	32	32	34				28	29	29	32
40		100		32	32	31	32				29	29	28	30
60		30		40	44	46	50				39	43	45	49
60		40		36	38	40	43				34	36	38	42
60		60		33	34	34	37				30	32	32	35
60		80		32	32	32	34				29	30	29	32
60		100		32	32	30	32				29	29	28	30
100		40		39	41	42	45				38	40	41	45
100		60		36	37	36	39				34	35	35	38
100		80		35	35	33	35				32	32	31	34
100		100		35	34	32	33				32	31	29	30

ORDERING INFORMATION

Explanation of Catalog Number. Example: PRA2GRFVA3FT120X3RF

PR

2 RF VA FT

BODY STYLE:

A=Air Handling

S=Static

PRISMALYTE plus:

Floating

Lens Frame

Recessed

Fluorescent

Troffer

	CEILING TYPE:	LENS/SHIELDING
	G= Grid	TYPE:
	(lay-in T bar)	VA=Virgin acrylic
	T=Slot grid or	(standard), see
	two-directional	options and
	concealed T	LENS FRAME: consult factory	LAMP
FIXTURE
WIDTH	see options)	RF=1/2" regressed	QUANTITY
		floating aluminum	2=2 Lamp
		frame with 7/16"	3=3 Lamp
		black reveal four
		sides.

LAMP TYPE/				OPTIONS:
FIXTURE LENGTH:
				Add appropriate
Twin Tube T5		VOLTAGE:
				suffix to catalog no.,
(Nominal 24")		120 or 277
					ie: (RF)
			BALLAST TYPE:
					<10THD
				<20THD
	1 &	2 Lamp Elec. TT5		SB*	IB*
	(40 Watt)			X3*	I3*
	1-3 Lamp Elec. TT5
	(40 Watt)			PB
	LOL TT5 Dimming				–
	*Instant Start Standard
		Other dimming options. Consult factory.

OPTIONS & ACCESSORIES

SPECIAL LENSES: Substitute VB for VA (standard) = .125" nominal pattern 12 with 7.8 oz. average weight per square foot. Substitute VI for VA (standard) =

.125" nominal pattern 12 with 6.8 oz. average weight per square foot. SPLAY TRIM: For T ceiling type only. SUFFIX: CTZ22 S2 SPLAY TRIM. RADIO INTERFERENCE FILTER: 120 or 277 volt, 50 or 60 Hz. One per fixture standard. SUFFIX: RF.

AIR CLOSURE STRIP: SUFFIX ACS2 (factory installed).

ELECTRICAL WIRING OPTIONS: Consult factory.

DRYWALL KIT: Order Catalog Number: FK92X2.

Request Folio OA30-10.

CHICAGO PLENUM: SUFFIX: CP.

SPECIFICATIONS

PERFORMANCE: In an installation of 3 lamp 40W luminaires in a room cavity ratio of 1, reflectance 80% ceiling, 50% wall, 20% floor, the C.U. shall not be less than .71. To prevent glare the VCP shall be not less than 36 either lengthwise or crosswise (at 100fc level) and the average brightness at 65° shall not exceed 4656 candelas per square meter. To control veiling reflections, luminaire output in the 30°-90° zone shall not be less than 66.2%.

AIR HANDLING: (PRA only) side air passages for air supply or air return. Supply

air is discharged vertically. Optional side closure strips. Air return is also pro- vided through the lamp compartment through fixture body ends.

MATERIALS: Chassis parts are die-formed code gauge cold rolled steel. Housing with side rails hemmed over and housing ends turned-in for safe handling. FINISH: Chassis exterior—black baked polyester enamel. Cavity—white baked polyester enamel minimum 86% reflectance. Phosphate undercoating. LENSES: VA (standard) extruded virgin acrylic, 3/16" square based female cones, running 45° to the panel edge, .095" nominal thickness (similar to pat- tern 12). VB (optional) .125" nominal pattern 12 with 7.8 oz. average weight per square foot. VI (optional) .125" nominal pattern 12 with 6.8 oz. average weight per square foot.

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.

© 2002 Genlyte Thomas Group LLC (Lightolier Division) A0902