Lightolier Page 2 of, Calculite Incancescent Open Downlight 784/7784, Job Information, Type

	Calculite® Incancescent Open Downlight 784/7784
Page 2 of 2	6” Aperture A23 Ellipsoidal Reflector

INITIAL FOOTCANDLES

60

50

40

30

20

10

150WAA23-

2700730 LumensPerPerLampLamp

RCR = 1 (Rm. Width - 10 x Mtg. Ht. above work plane) RCR = 5 (Rm. Width - 2 x Mtg. Ht. above work plane) RCR = 10 (Rm. Width - Mtg. Ht. above work plane)

Room Surface Reflectances:

80% Ceiling; 50% Walls; 20% Floor

		25		50		75	100		125
				AREA PER FIXTURE IN SQUARE FEET
3	4	5	6	7	8	9	10	11	12

CENTER TO CENTER DISTANCE OF FIXTURES IN FEET

This quick calculator chart determines the number and spacing of 150 Watt A-23 units for any desired level of illumination. For 200 Watt A-23 units, multiply chart values by 1.4.

Spacing Ration = 1.1

											Candlepower Summary
											DEG		CP		ZONAL FLUX
							90			2	1/2		1279			31
										7	1/2		1257			90
										12	1/2		1249			148
	300									17	1/2		1335			220
							60			22	1/2		1287			270
										27	1/2		1097			278
	600									32	1/2		646			190
										37	1/2		137			46
										42	1/2		25.6			9
	900									47	1/2		5.5			2
										52	1/2		0			0
	1200						30			ZONE		LUMENS		% LAMP
										0-30		1037		38.5
										0-40		1273		47.0
										0-60		1284		47.5
E.T.L, Inc. report No. 389989
Date: 04-17-64
Efficiency: 47.5%
					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
	1	.53	.52	.51	.52	.51	.51	.50	.50	.49	.48	.48	.48	.47	.47	.46	.45
RATIO	2	.51	.49	.48	.50	.48	.47	.48	.47	.46	.47	.46	.45	.46	.45	.44	.44
	3	.48	.47	.45	.48	.46	.45	.47	.45	.44	.45	.44	.43	.44	.44	.43	.42
	4	.46	.44	.43	.46	.44	.42	.45	.43	.43	.44	.42.	41	.43	.42	.41	.40
CAVITY
	5	.44	.42	.40	.44	.41	.40	.43	.41	.40	.42	.40	.39	.40	.40	.39	.38
	6	.42	.40	38.	42	.40	.38	.41	.39	.38	.40	.39	.38	.40	.38	.37	.37
ROOM	7	.40	.38	.36	.40	.38	.36	.39	.37	.36	.39	.37	.36	.38	.37	.36	.35
	8	.38	.36	.34	.38	.36	.34	.37	.35	.34	.37	.35	.34	.36	.35	.34	.33
	9	.36	.34	.32	.36	.34	.32	.36	.34	.32	.35	.34	.32	.35	.33	.32	.32
	10	.35	.32	.31	.35	.32	.31	.34	.32	.31	.34	.32	.31	.34	.32	.31	.30
						20% FLOOR CAVITY REFLECTANCE
								Conversion Factor:

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