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400 Watt ED-18 Philips High Pressure Sodium Non-Cycling Alto Lamp
400 Watt ED-18 Philips High Pressure Sodium Non-Cycling Alto Lamp
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Manufacturer: Philips Lighting
Product Number: 147439
SKU Number: 596632

General Description: This Philips High Pressure Sodium 400 watt light bulb has a non-cycling technology to help reduce long-term maintenance cost because it will fail to off when it is at its end of life. It can be used were any traditional 400 watt high pressure sodium ED18 light is used.  You will no longer have to wait for a light to cycle to confirm it needs replacement. This lamp has a 30,000 hour average rated life and provides 50,000 initial lumens. This high pressure sodium light bulb has Philips Alto technology making it environmentally friendly (only contains 5.4 mg of mercury).

  400 Watt Philips Non-Cycling HPS Mogul Base Lamp

Product Specifications

Manufacturer Philips Lighting
Product Number 147439
Voltage 105 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 30,000 Hours
Energy Star Qualified No
Dimmable No
Full Product Name HPS 400W S51 E39 ED18 ALTO NC
Ordering Code C400S51 NC
Case Quantity 12
Technology High Pressure Sodium (HID)
Alternate Product Number 14743-9
Specification Sheet

Features & Benefits

• Not Dimmable
• Non-cycling at end of life save starter and ballast
• Has mogul screw in base (E39)
• Contains 5.4 mg. of mercury

• 2100K color temperature (very yellow light)
• Produces 50,000 lumens
• Alto technology design passes the EPA TCLP non-hazardous materials requirement


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

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