Lightolier CS7142 Page 2 of, Quick Calculator, Spacing Ratio =, Coefficients Of Utilization

Calculite® Compact Fluorescent Surface Cylinder CS7142

Page 2 of 2

Quick Calculator

	80	ROOM SURFACE REFLECTANCES:
		80% Ceiling; 50% Wall; 20% Floor
	70	2400 Lumens Per Lamp
	60	RCR = 1 (Rm. width = 10 x Mtg. Ht. above work plane)
FOOTCANDLES		RCR = 5 (Rm. width = 2 x Mtg. Ht. above work plane)
	50	RCR = 10 (Rm. width = Mtg. Ht. above work plane)
	40
INITIAL	30
	20
	10

		20		40	60	80	100	120
			AREA PER FIXTURE IN SQUARE FEET
3	4	5	6	7	8	9	10	11

CENTER TO CENTER DISTANCE OF FIXTURES IN FEET

This quick Calculator chart determines the number and spacing of 1 lt.-32W PL-T units with Comfort Clear™ reflector for any level of illumination. Conversion factor: 1 lt. 26W PL-T with Comfort Clear Clear™ reflector for any level of illumination. reflector, F.C. x 0.8.

7 3/8" Aperture Triple Tube (4-Pin) Ceiling & Wall Mount

Quick Calculator

	80	ROOM SURFACE REFLECTANCES:
		80% Ceiling; 50% Wall; 20% Floor
	70	3200 Lumens Per Lamp
	60	RCR = 1 (Rm. width = 10 x Mtg. Ht. above work plane)
FOOTCANDLES		RCR = 5 (Rm. width = 2 x Mtg. Ht. above work plane)
	50	RCR = 10 (Rm. width = Mtg. Ht. above work plane)
	40
INITIAL	30
	20
	10

		20		40	60	80	100	120
			AREA PER FIXTURE IN SQUARE FEET
3	4	5	6	7	8	9	10	11

CENTER TO CENTER DISTANCE OF FIXTURES IN FEET

This quick Calculator chart determines the number and spacing of 1 lt.-42W PL-T units with Comfort Clear™ reflector for any level of illumination.

Spacing Ratio

Spacing Ratio = 1.1

REPORT PREPARED FOR: LIGHTOLIER

REPORT NO: LRL 499-9F2						CANDLEPOWER SUMMARY					REPORT NO: LRL 499-9E
REPORT PREPARED FOR: LIGHTOLIER					ANGLE			AVERAGE CP		LUMENS	REPORT BY: LIGHTING RESEARCH LABORATORY, INC.
											DESCRIP: 7.5” DIA. x 11 HT RECESSED DOWNLIGHT WITH COMFORT CLEAR™
REPORT BY: LIGHTING RESEARCH
						180		0			REFLECTOR. LAMPS: 1PLT 42W				LUMENS=3200
LABORATORY, INC.
						175		0		0						CANDLEPOWER SUMMARY
DESCRIP: 7.5” DIA. RECESSED DOWNLIGHT						165		0		0					85°
WITH COMFORT CLEAR™ REFLECTOR						155		0		0
LAMPS: 1PL-T 32W			LUMENS=2400			145		0		0	200				ANGLE		AVERAGE CP		LUMENS
						135		0		0					75°	180	0
						125		0		0						175	0		0
						115		0		0	400					165	0		0
				85°		105		0		0					65°	155	0		0
200						95		0		0	600					145	0		0
				75°		85		1		1						135	0		0
						75		2		2						125	0		0
400						65		3		3	800				55°	115	0		0
				65°		55		11		10						105	0		0
						45		226		175						95	0		0
600						35		678		426	1000					85	2		2
						25		933		432						75	4		4
				55°		15		1117		317	1200				45°	65	5		5
800						5		1179		113						55	16		14
						0		1126								45	334		258
					ZONAL LUMENS AND PERCENTAGES						1400					35	797		501
				45°												25	1178		545
1000					ZONE	LUMENS		% LAMP	%LUMINAIRE							15	1504		426
											1600					5	1585		151
					0-30		861	35.9		58.3		5°	15°	25°	35°	0	1518
1200					0-40		1287	53.6		87.1	0°
					0-60		1472	61.3		99.6					ZONAL LUMENS AND PERCENTAGES
					0-90		1478	61.6		100.0	**Efficiency=59.6%**
0°	5°	15 °	25°	35°	40-90		191	8.0		12.9					ZONE	LUMENS	% LAMP	%LUMINAIRE
					60-90		6	0.3		0.4
					90-120		0	0.0		0.0	May 14, 1999				0-30	1123	35.1		58.9
**Efficiency=61.6%**					90-150		0	0.0		0.0					0-40	1623	50.7		85.1
					90-180		0	0.0		0.0					0-60	1896	59.3		99.4
					0-180		1478	61.6		100.00					0-90	1908	59.6		100.0
															40-90	284	8.9		14.9
															60-90	12	0.4		0.6
															90-120	0	0.0		0.0
TESTED ACCORDING TO IES PROCEDURES. TEST DISTANCE EXCEEDS FIVE TIMES THE															90-150	0	0.0		0.0
															90-180	0	0.0		0.0
			GREATEST LUMINOUS OPENING OF LUMINAIRE.												0-180	1908	59.6		100.00

Coefficients Of Utilization

				EFFECTIVE CEILING CAVITY REFLECTANCE
			80			70			50			30			10		0
						WALL REFLECTANCE
		50	30	10	50	30	10	50	30	10	50	30	10	50	30	10	0
RATIO	1	.69	.67 .66		.67	.66	.65	.65	.64	.63	.63	.62	.61	.61	.60	.59	.58
	2	.65	.63	.61	.64	.62	.60	.62	.60	.50	.60	.59	.58	.58	.57	.56	.56
	3	.61	.59	.57	.61	.58	.56	.59	.57	.55	.58	.56	.55	.56	.55	.54	.53
CAVITY	4	.58	.55	.53	.57	.54	.52	.56	.54	.52	.55	.53	.51	.54	.52	.50	.50
	6	.52	.48	.40	.51	.48	.40	.50	.48	.40	.50	.47	.45	.49	.47	.45	.44
	5	.55	.51	.49	.54	.51	.49	.53	.50	.49	.52	.50	.48	.51	.49	.48	.47
ROOM	7	.49	.45	.43	.46	.45	.43	.48	.45	.43	.47	.44	.43	.46	.44	.42	.42
	8	.46	.42	.40	.40	.42	.40	.45	.42	.40	.44	.42	.40	.44	.41	.40	.39
	9	.43	.40 .37		.43	.39	.37	.42	.39	.37	.42	.39	.37	.41	.39	.37	.36
	10	.38	.35 .32		.38	.35	.32	.38	.35	.32	.37	.34	.32	.37	.34	.32	.31

20% FLOOR CAVITY REFLECTANCE

Coefficients of Utilization

EFFECTIVE FLOOR CAVITY REFLECTANCE = .20

			80			70			50			30			10
							WALL REFLECTANCE
		50	30 10											50	30 10		0
					50	30	10	50	30	10	50	30	10
	1	.66	.65 .64	.65 .64 .63				.63 .62 .61			.60 .60		.59	.58	.58 .57		.56
RATIO	2	.62	.60 .58	.61 .59 .57				.59 .58 .56			.57 .56		.55	.56	.55 .54		.53
	3	.58	.55 .53	.57 .55 .53				.56 .54 .52			.54 .53		.51	.53	.52 .50		.50
CAVITY	4	.55	.52 .49	.54 .51 .49				.53 .50 .48			.52 .50		.48	.51	.49 .47		.46
	5	.51	.48 .46	.51 .48 .45				.50 .47 .45			.49 .46		.45	.48	.46 .44		.43
	6	.48	.45 .42	.48 .45 .50				.47 .44 .42			.46 .44		.42	.45	.43 .41		.41
ROOM	7	.45	.42 .39	.45 .41 .39				.44 .41 .39			.43 .41		.39	.43	.40	.38	.38
	8	.42	.39 .36	.42 .38 .36				.41 .38 .36			.40 .38		.36	.40	.37	.36	.35
	9	.39	.36 .33	.39 .35 .33				.38 .35 .33			.38 .35		.33	.37	.35	.33	.32
	10	.37	.33 .31	.36 .33 .31				.36 .33 .31			.35 .32		.30	.35	.32	.30	.30

Job Information	Type:
Lightolier a Genlyte Thomas Company	www.lightolier.com

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