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Clear tubular high-pressure sodium lamp ED18 mogul screw base 250W

Philips

Philips C250S50/ALTO High Pressure Sodium Lamp 250W ED18 Mogul Screw (E39)

SKU CH-JNX0-FB7AM

High-pressure sodium HID lamp delivering 28,500 lumens at 250 watts with a 24,000-hour rated life and universal burning position

  • Product typeSpecialty Equipment Lamps
  • High output with 28,500 lumens from 250 W
  • Universal burning position suits any fixture orientation
  • 24,000-hour rated life reduces replacement frequency
  • Clear ED18 bulb with mogul screw base fits standard sockets
  • Operates down to -40 °F for cold-environment reliability

Philips C250S50/ALTO 250W HPS Lamp

The Philips C250S50/ALTO is a 250W high-pressure sodium lamp with an ED18 bulb and Mogul screw (E39) base. It produces 28,500 lumens at a 2,100K colour temperature with a CRI of 21. The lamp carries a rated life of 24,000 hours and operates universally in any burning position.

Suitability for HID Fixtures

This lamp suits installations that require a standard 250W HPS source with universal burning capability. Buyers needing a different wattage, a higher colour rendering index, or a shatter-resistant envelope should look at alternative products. It is not intended for use in fixtures that cannot accommodate the ED18 form factor.

250W High Pressure Sodium Specification

The defining specification is the 250W high-pressure sodium rating paired with the Mogul screw (E39) base. This combination determines compatibility with the ballast and socket in the target fixture. Verify that the existing system is designed for this exact wattage and base type before purchase.

How it compares

Measured against everything we stock in Lighting Fixtures & Bulbs, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 68% of the 491 comparable items (median $28.99).

Specifications

Product
Brand namePhilips
Product typeSpecialty Equipment Lamps

Questions about this item

Will the E39 mogul screw base on this 250 W Philips lamp fit the ballast and socket I already use for older HPS fixtures?

The lamp uses a standard mogul screw (E39) base, which is the common interface for 250 W high-pressure sodium ballasts, so it will screw into existing E39 sockets without adapters.

How can I confirm the lamp is operating correctly once installed in my fixture?

After warm-up the clear ED18 bulb should emit a steady golden-white light at the rated 28 500 lm and 2 100 K colour temperature, with no flicker or colour shift across the 360-degree beam angle.

Does the box include a ballast or any mounting hardware, or must those be purchased separately?

The package contains only the single C250S50/ALTO lamp in its original packaging; a compatible 250 W HPS ballast and an E39-rated fixture or socket must be supplied separately.

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