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Lamp Watts (Nominal) . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Lamp Operating Voltage (rms) (Nominal)

3

. . . . . . . . . . . 65

Initial Lamp Voltage Range (rms)

6

. . . . . . . . . . . . . . . . . . 57–73

Lamp Operating Current (Amps) (rms) (Nominal) . . . . 2.1
Maximum Lamp Starting Current (Amps) (rms) . . . . . . 3.2
Lamp Current Crest Factor (Maximum) . . . . . . . . . . . . 1.8
Warm-up Time to 80% of Output . . . . . . . . . . . . . . . . . 5 Minutes
Restrike Time for Hot Lamp. . . . . . . . . . . . . . . . . . . . . . 5 Minutes
Ballast Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI S54
Ballast Open Circuit Voltage (Minimum) . . . . . . . . . . . . 110
Pulse Peak Volts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 Min., 4000 Max.
Pulse Width @ 90% Peak . . . . . . . . . . . . . . . . . . . . . . . . 1 Micro Second Minimum
Pulse Frequency (Minimum)
Lag Ballast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 per Cycle
Lead Circuit Ballast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 per Half Cycle
Minimum Operating Temperature. . . . . . . . . . . . . . . . . . -30°C
Reference Ballast Impedance . . . . . . . . . . . . . . . . . . . . . 44 Ohms at 120V RIV
Maximum Lamp Watts . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Minimum Lamp Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Maximum Voltage Increase by Fixture . . . . . . . . . . . . . . 4

Featuring ALTO

®

Lamp Technology

Ceramalux

®

High Pressure Sodium Non-Cycling 100 Watt ED23

1

2

(Clear) Lamp

Philips Lighting Company 
200 Franklin Square Drive
P.O. Box 6800
Somerset, NJ 08875-6800
1-800-555-0050

A Division of Philips Electronics North America Corporation 

Updated 09/05

TDS-147405

Philips Lighting
281 Hillmount Road
Markham, Ontario
Canada L6C 2S3
1-800-555-0050  

A Division of Philips Electronics Ltd.

www.philips.com

100

90

80

70

60

0

0

%

Percent of Rated Average Life

4

P

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it

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L

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20

40

60

80

100

Approximate Lumen Maintenance Curve 

for ALTO NC HPS Lamps:

100

90

80

70

60

50

0

0

%

Percent of Rated Average Life

4

P

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l

L

u

m

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s

20

40

60

80

100

Approximate Survival Curve 

for ALTO NC HPS Lamps:

Footnotes:
1) Measured at 100 hrs. life. Approximate lumen values listed are for vertical or horizontal operation of lamp.
2) Approximate mean lumen output at 40% of lamp rated average life.
3) Measured at rated lamp watts on a linear reactor. LPW does not include ballast losses.
4) Rated average life is the life obtained, on the average, from large representative groups of lamps in laboratory tests under controlled conditions at 10 or more operating hours per start.

It is based on survival of 65% of the lamps and allows for individual lamps or groups of lamps to vary considerably from the average.

5) Approximate color temperature in Kelvin degrees.
6) Measured with the lamp operating at rated watts. Measured lamp voltage will change as the ballast changes lamp wattage.
* The TCLP is the US EPA’s Toxicity Characteristic Leaching Procedure

WARNINGS, CAUTIONS AND OPERATING
INSTRUCTIONS for Ceramalux High Pressure
Sodium Lamps

R

“WARNING:

These lamps must be operated

in fixtures designed for use with High Pressure

Sodium lamps.The fixture wattage rating must match
the wattage indicated on the outer glass bulb. Do not
scratch the outer bulb or subject it to pressure as this
could cause the outer bulb to crack or shatter. A partial
vacuum in the outer bulb may cause glass to fly if the glass
is struck. Operating the lamp improperly may result in

PERSONAL INJURY, PROPERTY DAMAGE,
BURNS AND FIRE.

1) If the outer glass bulb is broken, shut off power

immediately and remove the lamp after it has cooled.

2) Use only auxiliary equipment meeting Philips

and/or ANSI standards. Use within voltage limits
recommended by ballast manufacturer.

A. Operate lamp only within specified limits

of operation.

B. For total supply load refer to ballast manufacturers

electrical data.

3) Protect lamp base, socket and wiring against moisture,

corrosive atmospheres and excessive heat.

4) Replace the lamp if the outer glass bulb has been

scratched, cracked or damaged in any way.

5) If a lamp bulb support is used, be sure to insulate

the support electrically so as to avoid possible
decomposition of the bulb glass.

6) Do not use this lamp in a fixture which redirects a

substantial portion of the energy toward the arc tube
and its immediate vicinity, as this may lead to very early
lamp failure.

7) Take care in handling and disposing of lamps. If arc tube

is broken, avoid skin contact with any of the contents
or fragments.

8) The arc tube of this lamp contains sodium and

mercury. Dispose of in accordance with federal,
state and local requirements.

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