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

Para-Lite 4

3/4" x 3/4" 1/2"

Specifications

Parabolic Louvers shall be Para-Lite 4 as manufactured by A.L.P. Lighting & Ceiling Products, Inc., and shall be one piece injection molded of polystyrene or acrylic with all parabolic surfaces prepared with a primary undercoat and a highly specular vacuum metalized finish. Cell dimensions shall be 3/4" x 3/4" x 1/2" and shall provide 33° shielding with a louver efficiency of not less than 53%. This louver has a VCP index rating of .92 (specular silver finish). Available in nominal panel sizes of 1' x 4', 2' x 2' and 2' x 4'.

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	100	99	95	92	100	99	92	88
20	30	100	100	97	93	100	100	95	90
20	40	100	100	98	95	100	100	97	93
20	60	100	100	99	96	100	100	98	94
30	20	100	100	96	92	100	100	94	90
30	30	100	100	98	94	100	100	97	91
30	40	100	100	99	95	100	100	98	94
30	60	100	100	100	97	100	100	99	95
30	80	100	100	100	98	100	100	100	96
40	20	100	100	98	94	100	100	96	92
40	30	100	100	99	95	100	100	98	93
40	40	100	100	100	97	100	100	99	95
40	60	100	100	100	98	100	100	100	96
40	80	100	100	100	98	100	100	100	97
40	100	100	100	100	99	100	100	100	98
60	30	100	100	100	96	100	100	99	95
60	40	100	100	100	98	100	100	100	96
60	60	100	100	100	99	100	100	100	97
60	80	100	100	100	99	100	100	100	98
60	100	100	100	100	100	100	100	100	99
100	40	100	100	100	99	100	100	100	98
100	60	100	100	100	100	100	100	100	99
100	80	100	100	100	100	100	100	100	99
100	100	100	100	100	100	100	100	100	100

TS: TECHNICAL SUPPORT

Lighting Research Laboratories, Inc.

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

Description: Commercially Available 2' x 4' Troffer

2/32W T8 Lamps, 1/2" deep Parabolic Specular Silver Louver.

Luminary Watts = 60.2,

Catalog Number: Louver PL4 24 SPS

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

* Other testing results available upon request.

Total Luminaire Efficiency:		53.3%
Plane:	0°	90°
Spacing Criteria:	1.2	1.4
Shielding Angles:	33	33

Lighting Fixtures - Panel will sometimes require additional cutting for proper installation. Louver panels can also be specified with the Avoida-Notch™ optional frame - to specify add suffix-AN50 to the base catalog number. For color designation use B for black, W for white. For specular finish color designation should follow SP (i.e., G for gold, S for silver).

Lighted Ceilings - Louver panels are designed to fit any standard 1' x 4', 2' x 2' or 2' x 4' tee bar grid system.

Special Sizes - Special sizes are available, contact A.L.P.

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	63	63	63	63	62	62	62	62	59	59	59	57	57	57	54	54	54	53
1	60	59	57	56	59	58	56	55	55	54	53	53	53	52	52	51	50	49
2	57	54	52	50	56	54	51	50	52	50	49	50	49	48	49	48	47	46
3	54	51	48	46	53	50	47	45	48	46	45	47	45	44	46	44	43	42
4	51	47	43	41	50	46	43	41	45	42	40	44	42	40	43	41	39	39
5	48	43	40	37	47	43	39	37	42	39	37	41	38	36	40	38	36	35
6	45	40	36	34	44	39	36	34	38	36	33	38	35	33	37	35	33	32
7	42	36	33	30	41	36	33	30	35	32	30	35	32	30	34	32	30	29
8	39	33	30	27	38	33	30	27	32	29	37	32	29	27	31	29	27	26
9	36	30	27	24	36	30	27	24	29	26	24	29	26	24	28	26	24	23
10	33	26	22	20	32	26	22	20	25	22	20	25	22	20	25	22	20	19

SPECULAR FINISH

CATALOG NO.	DESCRIPTION	DIMENSION
PL4 14SPS	SPECULAR SILVER	11-3/4" X 47-3/4"
PL4 22SPS	SPECULAR SILVER	23-3/4" X 23-3/4"
PL4 24SPS	SPECULAR SILVER	23-3/4" X 47-3/4"

Products listed above are polystyrene. For Acrylic Louvers, add A after catalog number. DURABOLIC finish available on Specular Silver only. To order, replace SPS with DSPS. For other finishes replace SPS with SPG for Specular Gold* or SSS for Semi-Specular Silver.

*DURABOLIC Finish standard on Specular Gold.

ZONAL LUMEN SUMMARY

ZONE	LUMENS	% LAMP	% FIXT
0-30	1319	21.6	40.5
0-40	2204	36.1	67.8
0-60	3253	53.3	100
0-90	3253	53.3	100
90-180	0	0.0	0.0
0-180	3253	53.3	100.0

LUMINANCE DATA IN FOOTLAMBERTS

ANG. IN DEG.	AVG. 0-DEG.	AVG. 45-DEG.	AVG. 90-DEG.
45	2185	2645	3043
55	278	683	411
65	0	0	0
75	0	0	0
85	0	0	0

CANDLE POWER DISTRIBUTION

VER. ANG.	HORIZONTAL ANGLE					ZONAL LUMENS
VER. ANG.	0.0	22.5	45.0	67.5	90.0	ZONAL LUMENS
0.0	1623	1623	1623	1623	1623
5.0	1615	1615	1612	1613	1607	154
15.0	1577	1581	1601	1622	1643	455
25.0	1446	1469	1531	1607	1621	711
35.0	1250	1310	1415	1508	1554	885
45.0	950	1041	1150	1274	1323	891
55.0	98	158	241	184	145	158
65.0	0	0	0	0	0	0
75.0	0	0	0	0	0	0
85.0	0	0	0	0	0	0
90.0	0	0	0	0	0	0

ALP Lighting - Page 16