ALP LIghting (ALP Lighting & Ceiling Products, Inc.)

PLMA

ALUMINUM PARABOLIC LOUVERS

NOMINAL 3/4" HIGH ALUMINUM PARABOLIC LOUVERS

Specifications

A.L.P. lighting & Ceiling Products, Inc. manufactures a nominal 3/4" high aluminum parabolic louver to fit your requirements.

This louver is available with flexible cell sizes ranging from 1-1/2" to 6". These louvers are formed of aluminum to precise parabolic contours, including 45° corners. This louver is available in a standard finish of non-iridescent Softone™. Optional finishes are low-iridescent Semi-Specular Silver, Specular Silver or Baked White Enamel. In Addition, A.L.P. PLMA's are available with and without flanges.

VISUAL COMFORT PROBABILITY TABLE

100 FC Work Plane Illumination Work Plane FC = 100

		LUMINARIES LENGTHWISE				LUMINARIES CROSSWISE
ROOM DIM		MOUNTING HEIGHT
W	L	8.5	10	13	16	8.5	10	13	16
20	20	85	82	82	89	83	79	77	86
20	30	87	84	81	82	85	81	76	77
20	40	89	86	83	81	87	83	78	76
20	60	90	87	85	83	88	85	81	78

30	20	88	84	82	86	86	82	78	84
30	30	90	86	80	80	88	84	77	76
30	40	91	87	82	79	89	85	79	75
30	60	92	89	84	81	90	86	81	77
30	80	93	90	86	83	92	88	83	79

40	20	91	87	83	86	89	85	81	84
40	30	91	88	82	80	90	86	79	77
40	40	92	89	84	79	91	87	81	76
40	60	93	90	85	81	92	88	82	78
40	80	94	91	86	83	93	90	84	80
40	100	95	92	88	84	94	91	85	81

60	30	93	90	84	81	92	88	81	79
60	40	94	91	85	80	92	89	83	77
60	60	94	91	86	82	93	90	84	79
60	80	95	92	88	83	94	91	85	81
60	100	95	93	89	85	94	92	87	82

100	40	95	93	88	84	95	92	86	82
100	60	95	93	89	85	95	92	87	83
100	80	96	94	90	86	95	93	88	84
100	100	96	94	91	87	95	93	89	85

TS: TECHNICAL SUPPORT

Lighting Research Laboratories. Inc.

Test Report No. LRL 397-3B, Date 3/5/97

Description: Commercially Available 2' x 4' Troffer

2/32 W T8 Lamps, 3/4" deep Parabolic Semi-Specular Louver

Lumunary Watts = 60.7

Catalog Number: Louver PLMA 24 SSS (377 cells)

Lamp Type: F32T8/TL80. Lumens: 3050. Number of Lamps: 2

*Other testing results available upon request.

Total Luminaire Efficiency:		62.4%
Plane:	0°	90°
Spacing Criteria:	1.2	1.5
Shielding Angles:	27	29

A = Frame top opening must be greater than style Inside Dimension (ID). alp04c.GIF (16986 bytes)

*B = Overall Dimension of the louver must be greater than Inside Dimension and less than the Dimension of the door frame.

*C = Overall height of louver is 3/4", check for clearance.

By simply trimming O.D. flange to size, louver will fit most luminaires. The drawing will answer which style is the correct one to use.

Visit our Web Site at WWW.ALP-LTG.COM

ZONAL CAVITY COEFFICIENTS OF UTILIZATION

Ceiling Wall RCR	EFFECTIVE FLOOR CAVITY REFLECTANCE = 20
	80				70				50			30			10			00
	70	50	30	10	70	50	30	10	50	30	10	50	30	10	50	30	10	00
0	74	74	74	74	73	73	73	73	69	69	69	66	66	66	64	64	64	62
1	70	67	65	64	68	66	64	63	63	62	61	61	60	59	59	58	57	56
2	65	61	58	55	64	60	57	55	58	56	54	56	54	52	54	53	51	50
3	61	56	52	49	59	55	51	48	53	50	48	52	49	47	50	48	46	45
4	56	50	46	42	55	49	45	42	48	44	42	47	44	41	45	43	41	39
5	52	45	41	37	51	45	40	37	44	40	37	42	39	36	41	38	36	35
6	48	41	36	33	47	41	36	33	40	36	33	39	35	32	38	35	32	31
7	45	37	32	29	44	37	32	29	36	32	29	35	31	28	34	31	28	27
8	41	34	29	25	40	33	29	25	32	28	25	32	28	25	31	28	25	24
9	38	31	26	23	38	30	26	23	30	25	22	29	25	22	28	25	22	21
10	35	27	22	19	34	26	22	19	26	21	19	25	21	18	25	21	18	17

CATALOG NO.	DESCRIPTION	NOMINAL SIZE	I.D.	FLANGE SIZE	NO. CELLS	CELL CONFIGURATION
PLMA 14145STS3	Softone™ Semi Specular Silver	1' x 4'	8-1/4' x 44-1/4"	1-1/8"	145	5 x 29
PLMA 22169STS3	Softone™ Semi Specular Silver	2' x 2'	20-1/4" x 20-1/4"	1-1/8"	169	13 x 13
PLMA 24377STS3	Softone™ Semi Specular Silver	2' x 4'	20-1/4" x 44-1/4"	1-1/8"	377	13 x 29

Also available in Semi-Specular Silver (replace STS with SSS), Specular Silver (replace STS with SPS). Pale Gold (replace STS with SPG) and Baked White Enamel (replace STS with BEW). The above louvers come with a standard flange. The PLMA can be custom ordered in other cell sizes and configuration. Contact your A.L.P. representative for more information.

ZONAL LUMEN SUMMARY

ZONE	LUMENS	% LAMP	% FIXT
0-30	1211	19.9	31.8
0-40	2033	33.3	53.4
0-60	3537	58.0	92.9
0-90	3808	62.4	100.0
90-180	0	0.0	0.0
0-180	3808	62.4	100.0

LUMINANCE DATA IN FOOTLAMBERTS

ANG. IN DEG.	AVG. O-DEG	AVG. 45-DEG.	AVG. 90-DEG.
45	2031	2482	2723
55	1733	2144	2614
65	724	981	966
75	176	163	201
85	37	37	37

CANDLE POWDER DISTRIBUTION

VER. ANG	HORIZONTAL ANGLE					ZONAL LUMENS
VER. ANG	0.0	22.5	45.0	67.5	90.0	ZONAL LUMENS
0.0	1467	1467	1467	1467	1467
5.0	1458	1459	1459	1461	1462	139
15.0	1412	1430	1469	1499	1526	416
25.0	1299	1342	1400	1506	1545	656
35.0	1129	1199	1328	1416	1452	822
45.0	883	982	1079	1132	1184	818
55.0	611	689	756	845	922	686
65.0	188	225	255	269	251	240
75.0	28	23	26	29	32	29
85.0	2	2	2	2	2	2
90.0	0	0	0	0	0

ALP Lighting - Page 4