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

CRT Parabolic Louver Assembly

Specifications

The CRT Parabolic Louver Assembly shall be as manufactured by A.L.P. Lighting & Ceiling Products, Inc. This assembly shall include a one peace injection molded polystyrene or acrylic specular parabolic louver, .040" high transmission matte acrylic overlay and matching specular Avoida-Notch™ frame. The continuous frame shall be sonically welded to the louver panel and shall capture the overlay sheet on three sides, with the fourth partially open for lens removal, forming a unitized assembly. The louver shall be 3/4" x 3/4" x 1/2" (high) square cell, providing approximately 40° shielding from all angles. The complete assembly utilizing a specular silver lauver shall have an efficiency of 44% and VCP index rating of .94.

Specular finishes shall have all parabolic surfaces prepared with a primary undercoat, highly specular aluminum (mirror-like) vacuum metalized finish. Louvers are available in specular finish of silver. Standard panel sizes are 1' x 4', 2' x 4' with larger or custom sizes available.

*Optional Overlay - This parabolic louver assembly is available with an optional Frost overlay sheet. This premium overlay improves the optical control and efficiencies of the assembly as follows: efficiency of 46% and a VCP of .95. These figures are based on a specular silver louver. This optional overlay sheet is a .045" acrylic material with reinforced fiberglass strands.

Lighted Ceilings - The CRT Parabolic Louver Assembly can be designed to fit most standard 2' x 2' and 2' x 4' exposed ceiling tee bar systems.

Lighted Fixtures - When ordering the CRT Parabolic Louver Assembly for fluorescent lighting fixtures, a sample doorframe must be supplied to A.L.P. prior to fabrication

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
1	.50	.48	.47	.46	.49	.47	.46	.45	.46	.45	.44	.44	.43	.43	.42	.42	.41	.41
2	.47	.44	.43	.41	.46	.44	.42	.40	.42	.41	.40	.41	.40	.39	.40	.39	.38	.37
3	.44	.41	.38	.36	.43	.40	.38	.36	.39	.37	.36	.38	.36	.35	.37	.36	.34	.34
4	.41	.37	.35	.33	.40	.37	.34	.32	.36	.34	.32	.35	.33	.32	.34	.33	.31	.30
5	.39	.34	.31	.29	.38	.34	.31	.29	.33	.31	.29	.32	.30	.28	.32	.30	.28	.27
6	.36	.32	.28	.26	.35	.31	.28	.26	.30	.28	.26	.30	.28	.26	.29	.27	.26	.25
7	.34	.29	.26	.23	.33	.28	.26	.23	.28	.25	.23	.27	.25	.23	.27	.25	.23	.22
8	.31	.26	.23	.21	.30	.26	.23	.21	.25	.23	.21	.25	.22	.21	.24	.22	.20	.20
9	.29	.24	.20	.18	.28	.23	.20	.18	.23	.20	.18	.22	.20	.18	.22	.20	.18	.17
10	.27	.22	.18	.16	.26	.21	.18	.16	.21	.18	.16	.21	.18	.16	.20	.18	.16	.15

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	87	94	90	83	86	94	90	81
20	30	87	94	91	83	87	94	90	82
20	40	88	94	91	83	87	94	90	82
20	60	88	94	91	83	87	94	90	82

30	20	87	94	91	85	87	94	90	84
30	30	88	94	91	85	87	94	90	84
30	40	88	94	91	85	87	94	91	84
30	60	88	94	91	85	87	94	91	84
30	80	88	94	91	85	94	94	91	84

40	20	88	94	91	85	87	94	90	84
40	30	88	94	91	85	87	94	90	84
40	40	88	94	91	85	87	94	91	84
40	60	88	94	91	85	88	94	91	84
40	80	88	94	91	86	94	94	91	85
40	100	88	94	91	86	93	96	91	85

60	30	88	94	91	85	87	94	91	84
60	40	88	94	91	85	88	94	91	84
60	60	88	94	91	86	88	94	91	85
60	80	89	94	92	86	94	94	91	85
60	100	89	95	92	86	93	96	91	85

100	40	88	94	91	86	88	94	91	85
100	60	89	94	92	86	88	94	91	85
100	80	89	95	92	86	94	94	91	85
100	100	89	95	92	86	93	96	91	85

TS: TECHNICAL SUPPORT

Independent Testing Laboratories. Inc. Certified Test Report

No. 31196. Date: 8-23-85.

Description: Commercially Available 2' x 4' Troffer

with Specular Parabolic Plastic Louver - CRT.

Lamp: Four F40T12/CW. Each 3150

* Other testing results available upon request.

Total Luminaire Efficiency:		44%
Plane:	0°	90°
Spacing Criteria:	1.1	1.3
Shielding Angles:	40	40

CATALOG NO.	DESCRIPTION	NOMINAL SIZE
3/4" x 3/4" x 1/2" Specular Parabolic Louver, .040" High Transmission Acrylic Overlay and Matching Specular Avoida-Notch™ Frame
CRT 14SPS	SPECULAR SILVER	1' X 4'
CRT 22SPS	SPECULAR SILVER	2' X 2'
CRT 24SPS	SPECULAR SILVER	2' X 4'

CATALOG NO.	DESCRIPTION	NOMINAL SIZE
3/4" x 3/4" x 1/2" Specular Parabolic Louver, .045" Frost Acrylic Overlay and Matching Specular Avoida-Notch™ Frame
CRT 14SPS FO	SPECULAR SILVER	1' X 4'
CRT 22SPS FO	SPECULAR SILVER	2' X 2'
CRT 24SPS FO	SPECULAR SILVER	2' X 4'

Products listed above are polystyrene. To specify acrylic add suffix A to catalog number.

ZONAL LUMEN SUMMARY

ZONE	LUMENS	% LAMP	% FIXT
0-30	2499	19.8	45.1
0-40	3909	31.0	70.5
0-60	5541	44.0	100.0
0-90	5544	44.0	100.0
90-180	0	0.0	0.0
0-180	5544	44.0	100.0

LUMINANCE DATA IN FOOTLAMBERTS

ANG. IN DEG.	AVG. 0-DEG.	AVG. 90-DEG.
0	1572	1572
45	1058	1172
55	268	226
65	0	0
85	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	3288	3288	3288	3288	3288
5.0	3288	3288	3285	3281	3281	313
15.0	3116	3133	3164	3199	3199	892
25.0	2725	2763	2811	2895	2912	1294
35.0	2160	2187	2243	2324	2376	1410
45.0	1565	1551	1583	1660	1734	1239
55.0	321	386	446	353	271	394
65.0	0	0	0	4	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 18