Philips 20412-3 C1000S52/2

Philips 204123 Ceramalux® Instant Restrike C1000S52/2 – 1000W High Pressure Sodium | 135,000 lm | 2100K | 21 CRI | E39 Mogul | ANSI S52 | Instant Restrike | 24,000 Hours

The Philips 204123 (C1000S52/2) is a 1000W Ceramalux® Instant Restrike high pressure sodium (HPS) lamp with an E39 mogul base, delivering 135,000 initial lumens at 2100K with 21 CRI and 135 lm/W efficacy. The dual arc tube design enables instant restrike in approximately 1 second — when the primary arc tube is interrupted, the second arc tube ignites immediately, restoring light output to 80% within 1–2 minutes without the typical 5–15 minute cool-down required by standard single-arc-tube HPS lamps. ANSI S52 ballast required. Operates on standard HPS ballasts and auxiliary equipment. Enclosed fixture only. Contains sodium and mercury. Please verify ballast code, base type, and fixture before ordering.

Technical Specifications

Product Overview

The Philips 204123 (C1000S52/2) is a 1000W Ceramalux® Instant Restrike HPS lamp designed for high-bay industrial, warehouse, roadway, parking lot, and area security applications where continuous lighting is critical and standard HPS restrike delays of 5–15 minutes are unacceptable. The dual arc tube design is the defining feature: the lamp contains two complete arc tubes operating alternately, so when power is interrupted and restored, the cooler standby arc tube ignites within approximately 1 second, reaching 80% output in 1–2 minutes — compared to the 5–15 minute hot restrike delay of a conventional single-arc-tube HPS lamp.

At 135,000 initial lumens and 135 lm/W from 1000W, the lamp delivers the high efficacy expected of HPS technology for large-area illumination. Mean lumens at 40% of rated life are 126,000, reflecting the stable lumen maintenance characteristic of HPS sources. The 2100K warm yellow output and 21 CRI are inherent to high pressure sodium technology and are standard for roadway, security, and industrial applications where color rendering is secondary to raw output and efficacy.

The lamp operates on standard ANSI S52 HPS ballasts and auxiliary equipment with no special ballast modifications required for the instant restrike function. Rated average life is 24,000 hours; Philips notes that for applications where instant restrike is not required, a 40,000-hour rated life may be achievable by disabling the restrike function (confirm with Philips for specific application guidance).

Compatible Applications

• High-bay warehouse and industrial facility lighting where power interruptions must not cause extended blackouts
• Roadway and street lighting where instant restrike is a safety requirement
• Parking lot and area security lighting
• Post-top fixtures for commercial and municipal outdoor lighting
• Any 1000W ANSI S52 HPS fixture where instant restrike capability is specified

Before Ordering – Verify

• ANSI ballast code: S52. Confirm the existing ballast is rated for ANSI S52 at 1000W before installing. This lamp operates on standard HPS ballasts and auxiliary equipment — no special ballast is required for the instant restrike function.
• Base type: E39 Mogul screw base. Confirm the fixture socket is E39.
• Fixture must be enclosed. Do not operate in open fixtures. The fixture wattage rating must match or exceed 1000W.
• Physical size: MOL is 15.063″ (max) and diameter is 3.125″. Confirm the fixture housing accommodates these dimensions before ordering.
• Do not redirect energy toward the arc tube. Do not use this lamp in a fixture that redirects a substantial portion of the energy toward the arc tube and its immediate vicinity, as this may lead to early lamp failure.
• If a lamp bulb support is used: Insulate the support electrically to avoid possible decomposition of the bulb glass at the contact point.
• Lumens note: The individual Philips spec sheet (204123) lists 135,000 initial lumens; the Ceramalux family brochure table lists 140,000 for the C1000S52/2. We have used the individual spec sheet value as ground truth. Confirm with Philips/Signify if the higher figure is required for photometric calculations.

Safety and Handling Guidelines

• This lamp contains sodium and mercury; do not dispose of in municipal solid waste — recycle through a certified lamp recycling program per applicable federal, state, and local regulations
• The fixture wattage rating must match the lamp; do not scratch the outer glass 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; handle with care
• If the outer glass bulb is broken, shut off power immediately and remove the lamp after it has cooled
• If an arc tube breaks, avoid skin contact with any of the contents or fragments; the arc tube contains sodium and mercury
• Replace the lamp if the outer glass bulb has been scratched, cracked, or damaged in any way
• Protect lamp base, socket, and wiring against moisture, corrosive atmospheres, and excessive heat
• Use only auxiliary equipment (ballasts, capacitors, ignitors) meeting Philips and/or ANSI standards; operate within voltage limits recommended by the ballast manufacturer
• Operating the lamp improperly may result in personal injury, property damage, burns, and fire
• Allow the lamp to cool before handling; maximum bulb temperature reaches 400°C and base temperature reaches 210°C during operation

Compliance

• ANSI S52 Certified
• Enclosed fixture required
• Contains sodium and mercury (79.2 mg max Hg) — subject to federal and state lamp disposal and recycling regulations; check state-specific shipping restrictions before ordering in quantity

Ordering Information

• Product Number: 204123
• Ordering Code: C1000S52/2
• ANSI: S52
• UPC: 046677204129
• Case Quantity: 6 per case
• Logistics Code: 928601145301
• Reported cross-references (unverified — confirm before substitution): GE LU1000/2 (Lucalox Instant Restrike); Sylvania LU1000 (Lumalux)

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.