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400 Watt ED-18 Philips High Pressure Sodium Alto Lamp
400 Watt ED-18 Philips High Pressure Sodium Alto Lamp
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Manufacturer: Philips Lighting
Product Number: 368811
SKU Number: 441255

General Description: The Philips 400 watt High Pressure Sodium lamp is ideal for parking lots, garages and other industrial applications.  It produces 50,000 lumens of light while only using 400 watts of energy and has a average rated life of 24,000 hours.  This HID lamp requires a S51 ANSI code ballast to operate.  It has Philips ALTO technology which makes it non-hazardous material by the EPA TCLP specifications.

 400 Watt Philips Clear High Pressure Sodium Lamp
with Mogul Base (ED18)

Product Specifications

Manufacturer Philips Lighting
Product Number 368811
Voltage 100 Volt
Watts 400
Beam Angle 360°
Base Type Mogul (E39)
Bulb Style ED18
Length 9.75 Inches
Diameter 2.25 Inches
Lumens 50,000
Color Rendering Index (CRI) 21
Color Temperature  2100K
Rated Average Life 24,000 Hours
Energy Star Qualified No
Dimmable No
Full Product Name HPS 400W S51 E39 ED18 CL
Ordering Code C400S51 Alto
Case Quantity 12
Technology High Pressure Sodium (HID)
Alternate Product Number 36881-1
Specification Sheet

Features & Benefits

• This lamp requires a S51 ANSI code ballast
• Not Dimmable
• Has mogul screw in base (E39)
• Contains 31 mg. of mercury 

• Universal design mean that it will burn at any angle placement
• 2100K color temperature (very yellow light)
• Produces 50,000 lumens
• Alto designation means that it passes the EPA TCLP test for non-hazardous materials


• Ideal for use in parking lots, garages and industrial applications.

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