Sylvania 54129 HSD 575W/72 4ARXS Metal Halide Short-Arc Lamp — 575W | 7200K Blue-Rich Daylight | 45,000 Lumens | GX9.5 Prefocus Base

The Sylvania Entertainment 54129 (HSD 575W/72 4ARXS) Lamp is a professional-grade, high-intensity metal halide short-arc discharge bulb engineered exclusively for intelligent automated moving-head spotlights, theatrical scanners, concert wash luminaires, and specialized architectural profile projectors. Producing an exceptional 45,000 initial lumens of intense 7200K blue-rich daylight illumination, this premium single-ended capsule utilizes an advanced high-pressure gas fill to secure an 85 CRI color accuracy rating. Outfitted with a robust GX9.5 bi-pin prefocus base and patented 4ARXS eXtreme Seal thermal protection technology, it delivers a long-lasting 6,000-hour rated average service life under rigorous staging and touring environments.

ADL Supply Expert Application & Replacement Guide

The Sylvania HSD 575W/72 4ARXS single-ended lamp is a highly dependable entertainment baseline specified universally by stage lighting directors, touring gaffers, and theatrical system integrators for mid-to-large-scale intelligent automated fixtures. Operating at a vivid 7200K cool daylight balance, this high-pressure discharge capsule projects a piercing, crisp beam that maximizes color-filter rendering efficiency and cuts cleanly through high-density synthetic performance fog or complex architectural laser paths.

Critical 4ARXS Seal Tolerances and High-Voltage Ignition Requirements: Staging engineers and maintenance crews executing field replacements must evaluate environmental thermal limits closely prior to checking out: this bulb integrates patented 4ARXS metallurgy, applying an advanced chromium-coated layer directly over the internal molybdenum foil leads to safely protect the quartz base pinch seal from thermal oxidation up to 450°C. This robust configuration keeps the structural integrity of the single-ended envelope intact against the extreme localized heat cycles typical inside dense automated moving heads.

Installers must follow explicit initialization guidelines: while this short-arc lamp relies on a ballast-regulated 80V AC operating profile once stable, ionizing the cold gas column requires an initial **2.5 kV to 4.5 kV (2,500V to 4,500V) high-voltage strike pulse from an approved external igniter circuit**. Ensure the GX9.5 bi-pin prefocus contacts slide completely flush into the seating collar until locked to resist vibration-induced tracking arcing.

Detailed Product Specifications

• Brand Name: Sylvania (OSRAM Sylvania Entertainment Lighting Division)
• Product Series Line: HSD Metal Halide Short-Arc eXtreme Seal Series
• Sylvania NAED Factory Product Catalog Order Code SKU: 54129
• Full Manufacturer Description Model: HSD 575W/72 4ARXS
• UPC / EAN Logistical Tracking Number: 4008321158604 (Corrected global trade key)
• Core Technology Class: High-Intensity Discharge (HID) — High-Pressure Metal Halide Short-Arc Capsule
• Starting Method Classification: External Igniter Pulse-Start (Requires high-voltage strike loop)
• Primary Control Requirement: 575W Metal Halide Electronic or Magnetic Ballast + Igniter Kit
• Operational Power Draw: 575 Watts
• Nominal Arc Operating Voltage: 80V AC (Sustaining operating voltage across gas column)
• Continuous Operating Amperage Draw: 7.4 Amperes running current load profile
• Required Cold Ignition Pulse Threshold: 2.5 Kilovolts Minimum to 4.5 Kilovolts Maximum (2500V–4500V Spike)
• Initial Luminous Brightness: 45,000 Lumens (Post standard laboratory seasoning burn)
• Systemic Luminous Efficacy: 78.2 Lumens per Watt (LPW)
• Color Temperature Configuration: 7200K Blue-Rich Daylight (Clear Quartz Visual Finish)
• Color Rendering Index (CRI): 85 Ra (High Theatrical Precision Color Fidelity Baseline)
• Base Type Configuration: GX9.5 Bi-Pin Prefocus Base (Molded ceramic alignment insulation block)
• Maximum Pin Surface Temperature Limits: 450°C Max Pinch Seal safety threshold via 4ARXS shielding
• Maximum Overall Length (MOL): 135.0mm (5.31" Inches total structural length base to envelope tip)
• Light Center Length (LCL Dimension): 65.0mm (Precision calibrated optical focal height center)
• Electrode Arc Gap Distance: 7.0mm actual inner discharge center gap width
• Rated Average Service Lifespan: 6,000 Hours (Based on standard electronic pre-heat cycles)
• Chassis Burn Position Limit: Universal — Operates reliably at any horizontal, vertical, or tilted stage angle
• Fixture Safety Rating: Enclosed Fixtures Only Mandatory (Strict ultraviolet & fragment containment control)

Operation, Safety & Mounting Compliance

Low-Frequency Square-Wave Electronic Ballast Stabilization

When driven by modern high-efficiency solid-state electronic entertainment ballasts, this lamp processes power over precise low-frequency square waves, completely preventing internal acoustic arc resonance and visual plasma shifting loops typical under legacy magnetic waveforms. This advanced electronic stabilization maintains color-point integrity across your entire moving-head tracking wash row, ensuring adjacent spotlights project matched visual depth without color drift.

Mercury Content Dosing and Safe Bulk Recycling Protocols

This short-arc high-intensity capsule utilizes a highly concentrated chemical vapor volume of heavy-metal mercury to activate its hyper-bright discharge illumination track. While structurally shielded to endure extreme physical moving acceleration and intense internal atmospheres inside modern automated moving heads, it remains a hazardous component at end-of-life cycles. National environmental safety laws mandate processing spent modules through certified commercial e-waste repository centers during staging teardown sweeps rather than discharging them into municipal solid landfills or common trash streams.

Commercial Moving Head Cross-References

This premium 575W GX9.5 short-arc lamp serves as a replacement or alternative for the following lines:

• Philips Alternative Match: MSD 575 / Broadway single-ended prefocus series / USA Order Code 245431
• Osram Group Alternative: HSD 575W/60 4ARXS Lumend Line / Code equivalent
• Ushio Reference Match: HSD 575W GX9.5 Architectural Moving Head Bulb / Code 5001227

Bulk Commercial Lighting Supply & Project Support

ADL Supply delivers commercial-volume logistical fulfillment, tiered commercial contractor discounting strategies, and full pallet project quoting options to electrical accounts across the United States.

For formal wholesale inquiries, volume pricing modifications, or manufacturer spec sheet documentation, reach our commercial branch directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.