Lightolier 784/7084 Page 2 of, 6” Aperture T4 T.H. Ellipsoidal Reflector, Job Information, Type

Calculite® Incandescent Open Downlight 784/7084

Page 2 of 2

SOCKET IN LOW POSITION (PRE-SET)

	150				500 W T-4 Tungsten Halogen
FOOTCANDLES					9500 Lumens Per Lamp
	135
					RCR = 1 (Rm. Width - 10 x Mtg. Ht. above work plane)
	120
					RCR = 5 (Rm. Width - 2 x Mtg. Ht. above work plane)
	105				RCR = 10 (Rm. Width - Mtg. Ht. above work plane)
	90				Room Surface Reflectances:
	75				80% Ceiling; 50% Walls; 20% Floor
INITIAL	60
	45
	30
	15
	60	120	180		5240		300		360	420		480	540
	6 7 8	9 10 11 12	13	14	15	16	17	18	19	20	21	22	23	24

CENTER TO CENTER DISTANCE OF FIXTURES IN FEET

Use quick calculator chart to determine spacing of luminaires for desired level of illumination. Conversion Factor:

400W T-4: F.C. X 0.8

Spacing Ratio = 1.0

		Candlepower Summary
	DEG			CP	ZONAL FLUX
	90	0		8160
		1		8180		31
		3		8200		94
2000		5		8760		167
		7		8800		235
	60
		9		8560		294
		11		8400		352
4000		13		8280		408
		15		8220		467
		17		7720		495
6000		19		7360		526
		25		5940		2750
		35		2000		1256
8000	30	45		300		232
		55		24		22
		65		6		6
		75		5		5
ITL, Inc. report No.12328		85		4		4
	ZONE		LUMENS	% LAMP		% FIX
Date: 12-9-69
	0-30		5819	61.1		79.1
Efficiency: 77.1%	0-40		7075	74.3		96.2
	0-60		7329	77.0		99.7
	0-90		7344	77.1		100

COEFFICIENTS OF UTILIZATION

%EFFECTIVE CEILING CAVITY REFLECTANCE

			80				70			50			30			10		0
		50	30	10				% WALL REFLECTANCE							50	30	10	0
						50	30	10	50	30	10	50	30	10
	1	.86	.85	.83	.85		.83	.82	.82	.81	.79	.79	.78	.77	.76	.76	.75	.74
RATIO	2	.81	.78	.76	.80		.77	.75	.77	.75	.73	.75	.73	.72	.73	.72	.70	.69
	3	.76	.73	.70	.75		.72	.70	.73	.71	.69	.71	.69	.67	.70	.68	.66	.65
CAVITY	4	.72	.68	.65	.71		.67	.65	.69	.66	.64	.68	.65	.63	.66	.64	.62	.61
	6	.64	.60	.57	.64		.60	.57	.62	.59	.56	.61	.58	.56	.60	.58	.56	.55
ROOM	5	.68	.63	.60	.67		.63	.60	.66	.62	.60	.64	.61	.59	.63	.61	.59	.58
	7	.61	.56	.53	.60		.56	.53	.59	.56	.53	.58	.55	.53	.58	.55	.53	.52
	8	.57	.53	.50	.57		.53	.50	.56	.52	.50	.55	.52	.49	.54	.51	.49	.48
	9	.53	.49	.46	.53		.49	.46	.52	.49	.46	.52	.48	.46	.51	.48	.46	.45
	10	.50	.46	.43	.50		46	.43	.49	.45	.43	.49	.45	.43	.48	.45	.43	.42

20% FLOOR CAVITY REFLECTANCE

Conversion Factor: For 400W T4 units, multiply C.U.’s by 1.0

ITL, Inc. Report No. 12328C; Date: 12-9-69

6” Aperture T4 (T.H.) Ellipsoidal Reflector

SOCKET IN HIGH POSITION (RE-SET IN FIELD)

	150				500 W T-4 Tungsten Halogen
FOOTCANDLES					9500 Lumens Per Lamp
	135
					RCR = 1 (Rm. Width - 10 x Mtg. Ht. above work plane)
	120
					RCR = 5 (Rm. Width - 2 x Mtg. Ht. above work plane)
	105				RCR = 10 (Rm. Width - Mtg. Ht. above work plane)
	90				Room Surface Reflectances:
	75				80% Ceiling; 50% Walls; 20% Floor
INITIAL	60
	45
	30
	15
	60	120		180	5240		300		360	420		480	540
	6 7 8	9 10 11	12	13 14	15	16	17	18	19	20	21	22	23	24

CENTER TO CENTER DISTANCE OF FIXTURES IN FEET

Use quick calculator chart to determine spacing of luminaires for desired level of illumination. Conversion Factor:

400W T-4: F.C. X 0.8

Spacing Ratio = 0.3

	Candlepower Summary
	DEG	CP	ZONAL FLUX
90	0	27660
	1	27600		106
	3	25200		290
10000	5	19800		378
	7	15840		423
60
	9	13200		453
20000	11	11700		490
	13	10440		515
	15	9480		538
	17	8400		538
30000	19	7560		540
	25	4440		2056
30	35	1500		942
	45	156		121
40000
	55	72		65
	65	60		60
	75	48		51
ITL, Inc. report No. 12327	85	24		26
	ZONE	LUMENS	% LAMP	% FIX
Date: 12-9-69
	0-30	6327	66.4	82.9
Efficiency: 79.7%	0-40	7269	76.3	95.2
	0-60	7455	78.3	97.7
	0-90	7592	79.7	100

								COEFFICIENTS OF UTILIZATION
						% EFFECTIVE CEILING CAVITY REFLECTANCE
				80				70			50			30			10		0
			50	30	10				% WALL REFLECTANCE							50	30	10	0
							50	30	10	50	30	10	50	30	10
		1	.90	.88	.86	.88		.86	.85	.85	.84	.82	.82	.81	.80	.79	.78	.78	.76
RATIO		2	.84	.81	.79	.83		.80	.78	.80	.78	.76	.78	.76	.75	.76	.74	.73	.72
		3	.80	.76	.74	.79		.76	.73	.77	.74	.72	.75	.73	.71	.73	.71	.70	.69
CAVITY		4	.76	.72	.69	.75		.71	.69	.73	.70	.68	.72	.69	.67	.70	.68	.66	.65
		6	.69	.65	.62	.68		.64	.62	.67	.64	.61	.66	63	.61	.65	.62	.60	.59
ROOM		5	.72	.68	.65	.71		.67	.65	.70	.66	.64	.68	.66	.63	.67	.65	.63	.62
		7	.66	.62	.59	.65		.61	.59	.64	.61	.58	.63	.60	.58	.63	.60	.58	.57
		8	.63	.59	.56	.62		.58	.56	.61	.58	.55	.61	.58	.63	.60	.57	.55	.54
		9	.59	.55	.53	.59		.55	.53	.58	.55	.53	.58	.55	.52	.57	.54	.52	.51
		10	.57	.53	.50	.56		.52	.50	.56	.52	.50	.55	.52	.50	.54	.52	.49	.49
								20% FLOOR CAVITY REFLECTANCE
Conversion Factor: For 400W T4 units, multiply C.U.’s by 1.0
ITL, Inc. Report No. 12327C; Date: 12-9-69
		Job Information										Type:
	Lightolier a Genlyte Thomas Company															www.lightolier.com

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