Ideal for roadway lighting, bridge
and tunnel lighting, security lighting,
area floodlighting, railway crossing
lighting and airport lighting
◗ Excellent Energy Efficiency
Up to 180 lumens per watt
◗ Long Life
18,000 hours rated average life
◗Vibration Resistant
Rough service arc tube support system provides
protection against shock and vibration
Low Pressure Sodium Lamps (SOX-E, SOX)
High energy efficiency low pressure sodium lamps
for indoor and outdoor applications
Candlepower Distribution Curves (cd/1000 lm—candelas per 1000 lumens)
180º 150º 150º180º210º
C
120º 240º
C
120º
A-A
CC
B-B
50 cd 50 cd 50 cd
100 cd 100 cd 100 cd
90º
60º
30º0º
B
A
270º
300º
30º0º330º
CC
90º
60º
BA
LOW PRESSURE SODIUM LAMPS (SOX-E AND SOX)
Warm-Up Characteristics Effects of Input Voltage Variations
220
200
180
160
140
120
100
80
Percent of Nominal
60
40
20
0
0 2 4 6 8 10 12 14 16
Lamp Volts
Lamp Current
Minutes – Warm-up Time Percent of Line Volts
Lamp Watts
Light Output
150
140
130
120
110
100
Percent
90
80
70
60
50
90
95 100 105 110
Lamp Volts
Lamp Current
Lamp Watts
Light Output
Ordering
Code Bulb
SOX-E 18 T-17
SOX 35 T-17
SOX 55 T-17
SOX 90 T-21
SOX 135 T-21
SOX 180 T-21
Max. Diameter (B)
In. mm
2
1
⁄8
54
2
1
⁄8 54
2 1⁄8 54
2 11⁄16 68
2
11
⁄16 68
2 11⁄16
68
MOL1(A)
In. mm
8
1
⁄2
216
12
3
⁄16 310
16 3⁄4 425
20
3
⁄4 528
30 1⁄2 775
44 1⁄8 1120
Physical Dimensions
—SOX-E and SOX Lamps
Low Pressure Sodium Lamp Construction
LCL2(C)
In. mm
5
1
⁄2
141
7
1
⁄4 184
9 1⁄2 243
11
1
⁄2 292
16 3⁄8 416
23 584
Light Length (D)
In. mm
3
5
⁄8
92
7
1
⁄2 192
12 305
5
7
⁄8 403
25 7⁄16 646
38 965
1. MOL = Maximum Overall Length
2. LCL = Light Center Length
Base: Double Contact Bayonet-Medium (BY-22d)
A
B
C
D
1
7
2
5
3
4
6
8
1. Non-Metallic-Bayonet Base will not corrode or stick in lamp
socket, providing quick, safe relamping. Locking pins on lamp base
assure the lamp locks in socket and cannot vibrate loose. SOX-E
lamps are distinguished by the use of the black bases compared
to the tan bases used on SOX lamps.
2. Sodium Retaining Reservoirs provide even distribution of
sodium for 100% lumen maintenance, long lamp life and lamp
wattage control.
3. U-Bend Insulation Feature controls lamp wattage rise and
helps provide more consistent lamp life.
4. Rough Service Arc Tube Support System eliminates arc
tube movement along lamp axis yet allows radial arc tube flex.
It provides highest protection from shock and vibration.
5. Uniform Indium Oxide Heat Reflecting Coating creates
highest luminous efficacy of all light sources and contributes to 100%
lumen maintenance by keeping arc tube at the optimum temperature.
6. Barium Getter absorbs trace gases to properly maintain correct
arc tube temperature and maximize light output.
7.Triple Coil Electrode with full tungsten support holds more
emission paste for superior life.Tungsten suppor ts prevent
electrode vibration keeping emissive paste on the electrode.
8. Fuse Coil in lamp base provides additional protection to ballast.
By preventing D.C . cur rents that may occur at end of lamp life,
ballast currents are lower, ballast temperatures are lower and
ballast life is longer.
110º
0º
20º
Product ANSI Nominal Nominal Nominal Nominal Max. Rated Run Up
Number Ordering Ballast Operating on Lamp System Lamp Lamp Starting Average Time
046677- Code Code Ballast For Watts Watts Lumens Volts Current Current Life (Hrs.) (Minutes)
23404-7 SOX-E 18 L69 SOX 18 18 1800 55 0.36 0.42 18000 15
32781-7 SOX 35 L70 SOX 35 35 60 4550 70 0.6 0.60 18000 7
32151-3 SOX 55 L71 SOX 55 55 80 7800 109 0.59 0.59 18000 7
32152-1 SOX 90 L72 SOX 90 90 125 14300 112 0.91 0.94 18000 9
32153-9 SOX 135 L73 SOX 135 135 178 22600 164 0.95 0.95 18000 9
32799-9 SOX 180 L74 SOX 180 180 220 32000 240 0.91 0.91 18000 9
Light Output Over Life 100%
Base T emperature Limit 150º C
Bulb T emperature Limit 150º C
Lamp Brightness (SOX) 10 cd / cm
2
SOX-E 18
SOX 35
SOX 55
SOX 90
SOX 135
SOX 180
Philips Lighting Company
200 Franklin Square Drive■P.O. Box 6800
Somerset, NJ 08875-6800
1-800-555-0050
www.lighting.philips.com/nam
A Division of Philips Electronics North America Corporation
Printed in USA 4/03 P-1785-C
Philips Lighting
281 Hillmount Road
Markham, Ontario
Canada L6C 2S3
1-800-555-0050
www.lighting.philips.com/nam
A Division of Philips Electronics Ltd.
Electrical,Technical and Ordering Data (Subject to change without notice)
Operating Positions
Low Pressure Sodium Lamps (SOX-E and SOX)
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