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Sidelyte Recessed Fluorescent 

SIS2GPF2FT

Page 2 of 2

Direct/indirect 2' x 2' with Perforated Baskets

Static, 2 Lamp TT5

Lightolier 

a Genlyte company

www.lightolier.com

Technical Information: (978) 657-7600 • Fax (978) 658-0595
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.
© 2006 a Genlyte company

Section 5/Folio M17-10

Job Information

Type:

Ordering Information

Explanation of Catalog Number. Example: SIS2GPF2FT120SB

Options/Accessories

Fusing

: Internal fast-blow fusing. SUFFIX 

GLR

.

Internal slow-blow fusing.  SUFFIX 

GMF

.

Drywall Kit

: Order Catalog Number: 

FK92X2

.

Specifications

Performance

: In an installation of 2 lamp 40W luminaires in a room cavity ratio of 1, with

reflectance 80% ceiling, 50% walls, 20% floor, the C.U. shall not be less than .61. To
reduce glare the average brightness at 65° shall not exceed 2161 candelas per square
meter. To control veiling reflections, luminaire output in the 30°-90° zone shall not be less
than 75.2%.

Materials

Chassis parts

are die-formed code gauge cold rolled steel. Housing side rails

hemmed over and housing ends are turned-in for safe handling.

Lamp Shields:

22 gauge steel perforated mesh lamp shield with white acrylic overlay.

Finish

Chassis exterior

–black baked polyester enamel. 

Cavity

–white baked polyester

enamel minimum 86% reflectance. Phosphate undercoating.

Lamp Shield

: Baked flat white acrylic enamel.

Specifications (continued)

Electrical

: Thermally protected class “P” ballast C.B.M. approved, non PCB. If K.O. is

within 3" of ballast, use wire suitable for at least 90°.

Labels

: I.B.E.W. UL and ULc Listed.

SI

Sidelyte:

Direct/Indirect
Recessed with

Perforated Mesh

Shield

S

Body Style:

S

= Static

2

Fixture

Width

G

Ceiling Type

2

Lamp

Quantity:

2

=2 Lamp

FT

Lamp

(By Others)

FT

=Twin Tube T5

Options:

Add appropriate

suffix to catalog

no., ie: (GLR)

Ballast Type:

<

20THD

<

10THD

1-2 Lamp Elec. TT5

SB *

I

B *

(40 Watt)

1-2 Lamp Elec. TT5

PR

*

(40 Watt) Program Start

1-2 Lamp Elec. TT5

BE 

*

BP

*

(50 Watt) Program Start

1-2 Lamp Elec. TT5

BF

*

(55 Watt) Program Start

LOL Dimming TT5

PB 

*

*

(40 Watt)

* Instant Start Standard

NOTE:

For 

TT5 UNV

voltage you must use 

PR

BP

or 

BF

Ballast Code.

Voltage:

120, 277 or

UNV

=120-277

0.0

45.0

90.0

FLUX

0

1060

1060

1060

5

1056

1052

1054

15

1002

1008

1019

285

25

906

928

953

428

35

779

822

869

515

45

622

702

779

541

55

446

583

698

517

65

268

484

634

465

75

141

379

488

358

85

34

44

49

69

90

0

0

0

Model No. SIS2GPF2FT120SB

LER = FP - 42.4

IW - 72

BF - 0.88

Comparative yearly lighting energy cost per

1000 lumens = $5.66

Report Number: G2004263
Catalog Number: SIS2GPF2FT120SB
Lamps: FT40 40W BIAX
Luminaire: SIS 2'x2' with 2 perforated side
baskets.
Ballast: RCN-2TTP40-SC
Report is based on 3150 Lumens per lamp.

Efficiency: 55.1%

CIE Type-Direct-Indirect
Plane:

0-Deg

90-Deg

Spacing Criteria:

1.3

1.4

Shielding Angles:

90

90

Plane:

0-Deg

90-Deg

Luminous Length:

22.966

23.843

CANDELA DISTRIBUTION

AVERAGE AVERAGE AVERAGE AVERAGE

IN DEG.

0-DEG.

45-DEG.

90-DEG.

45

1267.

1430.

1587.

55

1120.

1464.

1753.

65

914.

1650.

2161.

75

785.

2110.

2717.

85

562.

727.

810.

LUMINANCE DATA IN CANDELA/SQ. METER

COEFFICIENTS OF UTILIZATION –

ZONAL CAVITY METHOD. EFFECTIVE 
FLOOR CAVITY REFLECTANCE 0.20

0

RC

80

50

30

RW 70 50 30 50 30 10 50 30 10

0

1 64 61 58 57 55 53 55 53 51

0

2 58 53 48 49 46 43 47 44 42

0

3 52 46 41 43 39 35 41 38 35

0

4 48 40 35 38 33 30 37 33 29

0

5 44 36 30 34 29 26 33 29 25

0

6 40 32 27 31 26 22 29 25 22

0

7 38 29 24 28 23 20 27 23 20

0

8 35 27 21 25 21 18 25 20 17

0

9 33 24 19 23 19 16 23 19 16

10 31 22 18 22 17 14 21 17 14

ZONE

LUMENS % LAMP

% FIXT

0

0-

0

30

0

813

14.8

24.8

0

0-

0

40

1328

24.1

40.5

0

0-

0

60

2387

43.4

72.8

0

0-

0

90

3279

59.6

100.0

90-180

000

0

0.0

00

0.0

0

0-180

3279

59.6

100.0

ZONAL LUMEN SUMMARY

P

Perforated

Lamp Shield

F

Single

White

Reflector

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