Lightolier 1178T User Manual

Lytecaster

®

Recessed Downlighting 1178T

Page 1 of 2 6 3/4” Aperture Low Profile Dropped Diffuser Reflector Trim

11 78T/1 102T Se rie s

Complete Fixture consists of Reflector Trim & Frame-In Kit. Select each separately.

ReflectorTrim Frame-In Kit — See Individual Frame-In Kit Specification Sheets

Fluorescent

Frame-In Kit Installation Type Lamping Height

1178T

Dropped Diffuser

1102T1
1102TH1
1102TH2
1102TM1
1102TM2
1102TH1R

1102T13U

Non-IC
Non-IC
Non-IC
Non-IC Emergency
Non-IC Emergency
Non-IC Remodeler

Non-IC 2 Lamp 13W Quad Tube

2 Lamp 13W Twin Tube
Compact Fluorescent
(Gx23) 2 Pin Base

Compact Fluorescent
(G24q-1) 4 Pin Base

3 7/8"
3 7/8"
3 7/8"
3 7/8"
3 7/8"
3 7/8"

3 7/8"

1102T18U

1102T26U

Non-IC 2 Lamp 18W Quad Tube

Compact Fluorescent
(G24q-2) 4 Pin Base

Non-IC 2 Lamp 26W Quad Tube

Compact Fluorescen
(G24q-3) 4 Pin Base

Features

1. Reflector: Hydroformed aluminum, 18 ga.; white gloss finish on inside and

trim flange.

2. Diffuser: Translucent white polycarbonate Lexan®. Installs and removes with

twist-lock action, no tools required. Gasketed to keep out dirt and moisture.
(Lexan® is a registered trademark of General Electric Corp.)

3. Frame-In Kit: (1102T1 standard frame shown; other frames listed above.)

See Frame-In Kit specification sheet for more details.

Options & Accessories

Accessory Cones: 1550 - Matte Black Step Baffle

1550 - CL, GD, BK, BA,

BG, WH, CD

Retaining Clips: 1955 - For installing in existing

ceiling.

Extra Wide Flange Trim Ring: 1954 - 8-7/8” O.D.
Plaster Ring: 1961

Labels

UL (Suitable for Wet Locations in Ceilings, Walls, Spas, and Hot Tubs), I.B.E.W.

3 7/8"

3 7/8"

Lexan® is a registered trademark of General Electric.

US Patent Nos. 4,313,154; 4,327,403

Job Information Type:

Job Name:

Cat. No.:

Lamp(s):
Notes:

Lightolier a Genlyte company www.lightolier.com

631 Airport Road, Fall River, MA 02720 • [phone] • Fax [phone]
We reserve the right to change details of design, materials and finish.
© 2006 Genlyte Group LLC • E1006

®

Lytecaster

Lytecaster

Page 2 of 2 6 3/4” Aperture Low Profile Dropped Diffuser Reflector Trim

Page 2 of 2 6 3/4” Aperture Low Profile Dropped Diffuser Reflector Trim

®

Recessed Downlighting 1178T

Recessed Downlighting 1178T

60

50

40

30

20

AVERAGE INITIAL FOOTCANDLES

10

10 30 40 5020 60

3 4 5 6 7 8

2

Use quick calculator chart to determine the spacing of 2 Lt. 26 Watt Quad Tube units for a desired level of illumination.
Conversion Factors: 2 Lt. - 18W Quad Tube, F.C. x 0.7; 2 Lt. - 13W Twin Tube, F.C. x 0.55.

AREA PER FIXTU RE IN SQU ARE FEET

CENTE R TO CENT ER DISTANCE OF FIXTU RES IN FE ET

ROOM SURFACE REFLECTANCES:

80% Ceiling; 50% Walls; 20% Floor

1800 Lumens Per Lamp
Large Room (RCR =1)

Small Room (RCR =5)

70

SPACING RATIO = 1.3

CERTIFIED TEST REPORTED NO. 0160FR

COMPUTED BY LSI PROGRAM **TEST-LITE**

6 1/4” DIA. APERTURE, WHITE REFLECTOR WITH DROP DIFFUSER

TWO 26W QUAD TUBE 2 PIN LAMPS. LUMEN RATING = 1800 LMS.

100

200

TESTED ACCORDING TO IES PROCEDURES.
TEST DISTANCE EXCEEDS FIVE TIMES THE
GREATEST LUMINOUS OPENING OF
LUMINAIRE.

RECESSED LYTECASTER DOWNLIGHT

CANDLEPOWER SUMMARY

ACROSS
45
ALONG

ANgLE ALONg 22.5 45 67.5 AcROSS LUMENS

0 187 187 187 187 187
5 187 188 190 185 185 18
10 185 187 189 183 181
15 183 184 187 181 178 52
20 179 180 183 177 175
25 174 176 178 172 170 81
30 168 169 172 166 164
35 161 162 165 159 156 101
40 153 154 157 150 148
45 144 145 148 141 139 111
50 134 135 137 131 129
55 123 124 127 120 117 110
60 111 113 116 108 105
65 99 102 103 95 91 98
70 86 89 89 85 79
75 70 74 73 75 65 77
80 55 57 60 63 51
85 39 41 46 50 38 49

zONAL LUMENS AND PERCENTAGES

ZONE LUMENS % LAMP % LUMINAIRE
0–30 150 4.17 19.19
0–40 251 6.98 32.10
0–60 472 13.12 60.34
0–90 696 19.34 88.94
40–90 444 12.36 56.84
60–90 223 6.22 28.60
90–180 86 2.41 11.06
0–180 782 21.75 100.00

** EffIcIENcy = 21.7% **

COEFFICIENTS OF UTILIzATION

% EFFECTIVE CEILING CAVITY REFLECTANCE

80 70 50 30 10 0

50 30 10 50 30 10 50 30 10 50 30 10 50 30 10

1 .22 .21 .20 .21 .20 .19 .19 .19 .18 .18 .18 .17 .17 .17 .16
2 .19 .17 .16 .18 .17 .15 .17 .16 .15 .16 .15 .14 .15 .14 .13
3 .16 .14 .13 .16 .14 .13 .15 .13 .12 .14 .13 .12 .13 .12 .11
4 .14 .12 .11 .14 .12 .11 .13 .12 .10 .12 .11 .10 .12 .10 .10
5 .13 .11 .09 .12 .10 .09 .12 .10 .09 .11 .10 .08 .10 .09 .08
6 .11 .09 .08 .11 .09 .08 .10 .09 .08 .10 .08 .07 .09 .05 .07
7 .10 .08 .07 .10 .08 .07 .09 .08 .06 .09 .07 .06 .08 .07 .06
8 .09 .07 .06 .09 .07 .06 .08 .07 .06 .08 .07 .05 .08 .06 .05

ROOM CAVITY RATIO

9 .08 .06 .05 .08 .06 .05 .08 .06 .05 .07 .06 .05 .07 .06 .05
10 .08 .06 .05 .07 .06 ..05 .07 .05 .04 .07 .05 .04 .06 .05 .04

Conversion factors: 18W Quad Tube, C.U. x 1.0
13W Twin Tube, C.U. x 1.1

% WALL REFLECTANCE

20% FLOOR CAVITY REFLECTANCE

0
.15

.13
.10
.09
.08
.07
.06
.05
.04
.04

Job Information Type:

Lightolier a Genlyte company www.lightolier.com

631 Airport Road, Fall River, MA 02720 • [phone] • Fax [phone]
We reserve the right to change details of design, materials and finish.
© 2006 Genlyte Group LLC • E1006