SERIES
LPT
2’ x 4’
VOLT TYPE JOB
2’ X 4’ L O W - P R O F I L E T 8 T R O F F E R
2 lamps
3 lamps
3-7/16”
23-13/16”
4 lamps
FEATURES
SPECI F I CATION S
•3-7/16” deep housing installs easily within limited
plenum space.
•Housing – 22-gauge die-formed C.R.S.
•Door Frame – 22-gauge C.R.S., offset mitered corners, cam latches, and T-style hinges.
•More than 83% efficient, the environmentally-friendly
LPT 2’ x 4’ may meet various regional energy rebate
requirements.
•Shielding – #12 pattern, .125” acrylic prismatic lens standard.
•Gasketed door frame features offset mitered corners to
eliminate light leaks.
•Finish – 92% minimum average reflective white
polyester powder coat bonded to phosphate-free,
multi-stage pretreated metal.
•Available with a wide variety of lens, lamping, and
ballast options.
•Electrical – Electronic ballast standard, instant start
T8, rated Class P.
•Cam latches close securely and allow hassle-free
maintenance.
•Labels – UL/CUL listed as recessed fluorescent
luminaire suitable for dry or damp locations.
•Reversible door hinges and latches allow access on
either side.
•Mounting – NEMA Type “G” standard. For flange
installations use the Drywall Frame-In Kit (DFK),
sold separately.
•Deep reinforcement ribs provide added strength.
•Integral T-bar clips quickly secure fixture to structure.
•All parts painted after fabrication to facilitate
installation, increase efficiency, and inhibit corrosion.
ORDERING INFORMATION
•This fixture is proudly made in the USA.
Submittal
SERIES
EXAMPLE:
SERIES
LPT
Low-Profile T8 Troffer
NOM. NOM. TOTAL WATTAGE/ DOOR
TYPE
WIDTH LENGTH LAMPS TYPE
OPTIONS
BALLAST
TYPE
VOLTAGE
LPT - 2 4 - 3 32 - S A12125 - OPTIONS - EB3 - UNV
SHIELDING
A12125
NOMINAL WIDTH
2
2’
A12100
A19156
PC1SS
NOMINAL LENGTH
4
4’
PC2SS
TOTAL LAMPS
2, 3, or 4
SHIELDING
OPTIONS
F338
LAMP WATTAGE/TYPE
32
4’, 32-watt T8
F348
DOOR FRAME TYPE
S
White Flat Steel
EQCLIPS
MS91
MS111
12 pattern acrylic, .125” thick
#
(standard)
#12 pattern acrylic, .100” thick
#19 pattern acrylic, .156” thick
Nominal 1/2” x 1/2” x 1/2”
silver polystyrene
Nominal 1-1/2” x 1-1/2” x 1”
silver polystyrene
’, 3/8” flex, 3 conductor,
6
No. 18 AWG
6’, 3/8” flex, 4 conductor,
No. 18 AWG
Earthquake Clips (4 per fixture)
Master Satellite, 9’ Flex Whip 1
Master Satellite, 11’ Flex Whip 1
1 Consult factory for other lengths.
BALLAST
EB2
EB3
EB4
EB2/1
EB2/2
TYPE
2-lamp electronic ballast
3-lamp electronic ballast
4-lamp electronic ballast
(1) 2-lamp & (1) 1-lamp electronic ballast
(2) 2-lamp electronic ballasts
VOLTAGE
120
120V
277
277V
UNV
347
120-277V
347V
LAMPS FURNISHED & INSTALLED: Ordering Example: FO32/835/ECO F&I
EMERGENCY BALLASTS:
Ordering Example: EM7A
For complete lamps and emergency ballast
offering refer to information section.
H.E. Williams, Inc. • Carthage, Missouri • www.hewilliams .com • 417-358-4065 • Fax: 417-358-6015
Troffer Page 20
2’ x 4’
SERIES
LPT
PHOTOMETRY
I N F O R M A T I O N
Williams Catalog #LPT-24-332-SA12125-EB3
Test Report #14727.1, Dated 06/04/09
Lamp Type: F32T8/835/RS
Lamp Quantity: 3
CANDLEPOWER DISTRIBUTION
VERT.
ANG.
0
5
15
25
35
45
55
65
75
85
90
LUMEN SUMMARY
90°
HORIZONTAL ANGLE
ZONAL
0
45
90
LUMENS
3016. 3016. 3016.
3016. 3019. 3025. 288.2
2877. 2916. 2957. 826.4
2662. 2753. 2826. 1272.4
2280. 2418. 2475. 1503.2
1685. 1775. 1904. 1378.7
1092.
1131. 1285. 1043.1
619.
531.
645. 577.3
332. 294.
371. 335.7
118.
126.
133. 141.9
0.
0.
0.
ZONE
0 - 30
0 - 40
0 - 60
0 - 90
Total Luminaire
0-180
LUMENS
2387.
3890.
6312.
7367.
7367.
80°
70°
60°
50°
40°
30°
10°
0°
ZONAL CAVITY COEFFICIENTS
% LAMP
27.0
44.0
71.3
83.2
83.2
% FIXTURE
32.4
52.8
85.7
1 0 0.0
EFFECTIVE FLOOR CAVITY REFL. = .20
.50
CEILING
.80
.70
WALL
RCR
.70 .50 .30
.70 .50 .30
1 0 0.0
TOTAL LUMINAIRE
OPTICAL EFFICIENCY = 83.2%
SPACING CRITERIA: END= 1.2 DIAG.= 1.3 ACROSS= 1.3
BACK
20°
.50 .30 .10
0
.99
.99
.99
.97
.97
.97
.92
.92
.92
1
.92
.88
.85
.90
.87
.84
.83
.81
.79
2
.85
.79
.74
.83
.77
.73
.75
.71
.67
3
.79
.71
.65
.77
.70
.64
.67
.62
.59
4
.72
.64
.57
.71
.63
.56
.61
.55
.51
5
.67
.57
.50
.65
.56
.50
.54
.49
.44
6
.62
.51
.44
.60
.51
.44
.49
.43
.39
7
.57
.46
.39
.56
.46
.39
.44
.39
.34
8
.52
.42
.35
.51
.41
.35
.40
.34
.30
9
.48
.37
.31
.47
.37
.31
.36
.30
.26
10
.45
.34
.28
.44
.34
.27
.33
.27
.23
V I E W
2 & 4 Lamps
3 Lamps
7/8” KO
Access Plate
w/(2) 7/8” KOs
7/8” KO
Access Plate
w/(2) 7/8” KOs
48”
H.E. Williams, Inc. • Carthage, Missouri • www.hewilliams .com • 417-358-4065 • Fax: 417-358-6015
Information contained herein is subject to change without notice.
HEW70057 03/05/12JJ