Lightolier Silhouette SB manual Performance, Fixture Lengths & Mounting Locations, Sample Run

Lighting Systems Silhouette® SB

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Performance

CANDLEPOWER CURVE

180˚	175˚	165˚	155˚	145˚	135˚
1250
1000					125˚
750		0˚		90˚	115˚
500
					105˚
250					95˚
0					90˚
					85˚
					75˚
					65˚
					55˚
0˚	5˚	15˚	25˚	35˚	45˚

REPORT NO: LRL 299-1B

CAT NO: SB24I281WH

LAMPS: 2F28T5

LUMENS: 2900

EFFICIENCY: 82.0%

	CANDLEPOWER										COEFFICIENTS OF UTILIZATION
ZONE	0	22	45	67	90				% EFFECTIVE CEILING CAVITY REFLECTANCE
DEG.		CANDELAS									80			70				50
180	1101	1101	1101	1101	1101							WALL REFLECTANCE
175	1098	1105	1106	1127	1125					70	50	30	70	50	30		50	30	10
165	1077	1132	1205	1308	1305			0		79	79	79	69	69	69		49	49	49
155	1020	1150	1288	1334	1328	RATIO	1			72	68	65	62	59	57		42	40	39
135	746	970	961	1065	1083		3			60	52	47	51	45	41		32	29	27
145	906	1120	1171	1180	1191	CAVITY	2			65	60	55	56	52	48		37	34	32
125	602	744	843	947	904		4			54	46	40	47	40	35		28	25	22
115	407	528	646	771	814		5			50	41	34	43	35	30		25	22	19
105	227	353	501	530	533	ROOM	6			45	36	30	39	31	26		22	19	16
95	42	115	115	120	120		7			42	32	26	36	28	23		20	17	14
90	12	18	27	43	50		8			38	29	23	33	25	20		18	15	12
85	9	15	30	48	55		9			36	26	20	31	23	18		16	13	11
75	9	19	42	63	70		10			33	24	18	28	21	16		15	12	9
65	9	28	52	72	79						20% FLOOR CAVITY REFLECTANCE
55	18	24	63	80	85							DISTRIBUTION
45	26	51	61	80	81		Zone
35	36	60	65	73	74						Lumens		% Lamp			% Luminaire
25	32	55	61	68	68		0-90					312		5.4		6.6
15	28	57	59	84	87		90-180				4444			76.6		93.4
5	26	36	44	61	82		0-180				4756			82.0		100.0
0	26	26	26	26	26

Calculations are for 28 watt T5 lamps, for 54 watt T5 lamps multiply by 1.7

Quick Calculator and Ceiling Brightness

	2,000	FOOTCANDLE					20	30	50		70	100
FEET	1,000
	700
SQUARE
	500
IN	400
AREA
	300
ROOM	200
	100
	1	2	3	4	5	7	10	20	30	40	50	70	100	200

NUMBER OF FIXTURES REQUIRED

1.Find room area on vertical axis.

2.Move across chart to footcandle curve.

3.Move down to horizontal axis and read number of fixtures required.

Suspension Length	12"	18"	24"
Footlamberts Above Fixture	216	147	113
Footlamberts Between Fixtures	24.3	26.5	30.1
Ceiling Brightness Ratio	8.9	5.5	3.8

Reflectances of 80% ceiling, 50% walls and 20% floor. Light loss factor is .85, Room size is 50' x 50',

Run Spacing 10’. Ceiling Height 9’ to 12’. Values are taken from the center of the room.

Fixture Lengths & Mounting Locations

4-Foot Joiner		5/8” (1.59cm)
		8-Foot Joiner
	48” (121.92cm)

1-1/4” (3.18cm)

96” (243.84cm)

Sample Run	8-Foot Joiner	4-Foot Joiner	8-Foot Joiner	Cable
Power Feed				Assembly
End Set	96” (243.84cm)	48” (121.92cm)	96” (243.84cm)

20’ 1/8” (609.92cm)

Mounting & Joiner Block Accessories

4.6” (11.68cm)

4” (10.16cm)

8”

(20.32cm)

4” (10.16cm)

8” (20.32cm)
4” (10.16cm)
3.4”	4”
(8.64cm)	(10.16cm)

Cable Assembly	Power Feed End Set	“L”Block with Suspension		“X” Block with Suspension		“T” Block with Suspension
SC36	SE36WH (white)	SL36WH (white)		SX36WH (white)		ST36WH (white)
	SE36AL (aluminum)	SL36AL (aluminum)		SX36AL (aluminum)		ST36AL (aluminum)
Inline block available (SI36WH or SI36AL).
			Job Information		Type:


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We reserve the right to change details of design, materials and finish.

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