GE 88546 BTM 500W 120V P28s Quartzline Halogen Lamp – Q500T6/4CL/2P Stage & Studio Replacement

17,000 lumens at 3200K with CRI 100 – a professional 500W T6 quartz halogen lamp with P28s prefocus base for stage, film, and broadcast lighting.

Quick Specs

• Brand: GE Lighting
• Part Number: 88546
• ANSI Code: BTM
• Lamp Type: Quartzline Halogen (SSTV)
• Wattage: 500W
• Voltage: 120V
• Base Type: P28s Medium Prefocus
• Color Temperature: 3200K (Studio White)
• CRI: 100
• Initial Lumens: 17,000 lm
• Rated Average Life: 500 hours
• Bulb Shape: T6

Product Overview

The GE 88546 BTM Quartzline Halogen Lamp is a 500-watt, 120-volt T6 halogen lamp designed for professional stage, studio, and broadcast lighting systems. It delivers approximately 17,000 initial lumens at 3200K studio white with CRI 100, providing accurate color rendering for film, theater, and television production environments.

The P28s medium prefocus base ensures precise optical alignment in compatible fixtures, while GE Quartzline technology delivers stable color output and reliable performance throughout the 500-hour rated life. The compact T6 bulb shape (0.79-inch diameter) with 5.10-inch overall length fits standard stage and studio luminaires.

Why Choose This Product

• 17,000 initial lumens – high-output 500W halogen: Provides excellent brightness for key, fill, and backlighting in professional entertainment applications.
• ANSI BTM – industry-standard replacement: The BTM ANSI code guarantees consistent electrical and photometric performance for stage and studio fixtures.
• 3200K studio white – broadcast-matched color: Camera systems set to 3200K tungsten white balance reproduce colors accurately under this lamp.
• CRI 100 – full-spectrum color accuracy: Continuous-spectrum halogen light renders all wavelengths without gaps – essential for film and video production.
• P28s prefocus base: Provides repeatable optical alignment in ellipsoidal spotlights, fresnels, and follow spots.
• Quartzline technology: Maintains lumen output and color stability over lamp life.

Technical Specifications

Dimensions

Applications

• Theater and stage lighting fixtures – ellipsoidal spotlights, fresnels, follow spots
• Film and television production lighting
• Broadcast studio lighting
• Concert and entertainment lighting systems
• Professional photography lighting equipment

Compatibility & Replacement

Fixture type: This lamp fits professional stage and studio fixtures designed for a P28s medium prefocus base and 500W T6 halogen lamps – typical in ellipsoidal spotlights, fresnels, and follow spots from brands like ETC, Altman, Strand, and Source Four.

Base: P28s medium prefocus – a two-pin base that ensures repeatable optical alignment.

Ballast: No ballast required – operates directly on 120V mains power.

Before ordering, confirm:

• ANSI code – BTM: Verify your fixture specifies ANSI BTM or accepts 500W/120V T6 halogen lamps with P28s base.
• Voltage – 120V: Verify fixture and supply circuit are 120V. Do not install in 240V or 208V fixtures.
• Base type – P28s: Confirm your fixture uses a P28s prefocus lampholder (not G9.5 or medium screw base).
• Physical dimensions: Verify your fixture accepts a T6 bulb with 5.10-inch MOL and 0.79-inch diameter.
• Fixture wattage rating: Ensure fixture is rated for at least 500W.

Ordering Information

• Brand: GE Lighting
• Part Number: 88546
• ANSI Code: BTM
• Lamp Type: 500W 120V Quartzline Halogen – P28s Base, T6, 3200K
• Case quantities and bulk pricing: Contact ADL Supply for volume orders.

Compliance & Certifications

• Verify UL listing status with manufacturer specification sheet.
• Verify RoHS compliance status with manufacturer specification sheet.
• Verify FDA radiation performance compliance with manufacturer specification sheet.
• Verify Prop 65 warning requirements with manufacturer specification sheet.

ADL Supply recommends confirming all applicable compliance data with the GE official product data sheet (ANSI BTM / SKU 88546) prior to specification or installation.

Safety & Handling Notes

• Do not touch glass: Oils from skin cause hot spots and premature failure. Always handle with gloves or a lint-free cloth.
• High temperature operation: Allow lamp to cool completely before replacement.
• Use approved fixtures only: Install only in fixtures designed for this lamp type and wattage.
• Verify voltage compatibility: Operating above 120V significantly reduces lamp life and may cause rupture.
• Wear protective eyewear: Halogen lamps operate under internal pressure – use face shield during handling.
• UV output: Use only in enclosed luminaires with appropriate UV filtering.