SYLVANIA 64338 | MC70T6/U/G12/940 METALARC® POWERBALL® 70W Ceramic Metal Halide Lamp

The Sylvania 64338 (MC70T6/U/G12/940) is an industrial-grade **70W high-intensity discharge (HID) ceramic metal halide lamp** engineered for high-end retail showrooms, art galleries, commercial accent displays, and architectural outdoor facades. Outfitted with a precision **G12 ceramic bi-pin base** and a compact **T6 clear quartz glass envelope**, this pulse-start module utilizes proprietary **POWERBALL® spherical arc tube technology** to project an intense, brilliant **4200K Cool White** light. Delivering an elite **95 CRI** color accuracy rating and producing **6,800 initial lumens** of high-efficacy light, it features an extended **15,000-hour rated service life**. Built with integrated **UV-Stop quartz glass** and rated for a **universal burning position**, this highly stable source minimizes color temperature drift over time, ensuring flawless structural illumination across professional layouts.

POWERBALL® Ceramic Arc Tube Efficacy and Color Stability

Sylvania METALARC® POWERBALL® lamps combine advanced ceramic materials with specialized spherical arc tube configurations to maximize thermal uniformity and lumen maintenance. Unlike standard cylindrical arc chambers, the rounded ceramic core optimizes internal gas currents and minimizes temperature fluctuations. This design preserves the lamp's crisp **4200K cool white light** and tightly caps color drift to a minimal 400K shift over its entire lifespan. Combined with an integrated **UV-Stop quartz outer envelope**, this T6 module cuts down on harmful ultraviolet emissions, protecting delicate retail stock, museum materials, and fabric displays from UV fading.

• Universal Burning Orientation: Engineered to run at any angle or tilt configuration without restricting arc stability, light distribution, or thermal capacity.
• Pulse Start Ignition Performance: Delivers quicker hot-restrike warm-up intervals, better system efficiency, and higher long-term lumen maintenance than older probe-start hardware.
• Elite 95 Color Rendering Index: Achieves a near-perfect **95 CRI color accuracy**, rendering deep colors, precious metals, and fine textures with rich realism.
• Extended Relamping Intervals: Features a long **15,000-hour rated life**, decreasing overall maintenance overhead and lowering structural relamping expenses in high-access setups.

Comprehensive Technical Specifications

• Brand: Sylvania
• Product Family / Series: METALARC® POWERBALL® Ceramic
• Product Code / NAED Number: 64338 (Cross-compatible with 64967)
• Ordering Abbreviation: MC70T6/U/G12/940
• Technology Type: High-Intensity Discharge (HID)
• Chemical Classification: Ceramic Metal Halide (CMH)
• Nominal Wattage: 70W
• Operating Lamp Voltage: 91V
• Operating Lamp Current: 0.98 Amps
• ANSI System Circuit Code: M139/M98/E (Also compatible with C139/C98/E architectures)
• Bulb Shape Configuration: T6 Clear Glass Profile
• Base Type: G12 Ceramic Bi-Pin (2-Pin, 12mm Pin Center-to-Center Spacing)
• Initial Luminous Flux: 6,800 lm
• Luminous Efficacy: 97 lm/W
• Color Temperature: 4200K (Cool White Spectrum)
• Color Rendering Index (CRI): 95
• Ignition Operational Mode: Pulse Start
• Average Rated Lifespan: 15,000 Hours
• Operating Burning Position: Universal (All mounting angles)
• Maximum Overall Length (MOL): 3.94 Inches (100 mm)
• Light Center Length (LCL): 2.36 Inches (60 mm)
• Bulb Envelope Diameter (DIA): 0.71 Inches (18 mm)
• UV Shielding Class: UV-Stop Quartz Glass
• Country of Manufacture: Germany

System Integration, Ballast Matching & Safety Protocols

• Mandatory Enclosed Fixture Rating (E-Type): This ceramic metal halide lamp operates under extreme internal pressures and high temperatures. It **must exclusively be installed within approved enclosed luminaires**. The host fixture must feature a tempered, thermal-shock resistant safety glass shield capable of safely holding hot quartz fragments if the internal arc tube fails or ruptures.
• Ballast & Socket Matching Protocol: This module requires a matching **ANSI M139/M98/E or C139/C98/E** electronic or thermally protected electromagnetic ballast circuit. Do not use on non-compliant lines. Because pulse-start ignition systems use high-voltage starting pulses, this lamp **must only be paired with 4000V pulse-rated G12 sockets**.
• Ultraviolet Radiation Warning: This lamp can cause serious skin burns and eye inflammation from shortwave ultraviolet radiation if the outer glass envelope is cracked, broken, or punctured. Do not use where people will remain for more than a few minutes unless adequate shielding or safety interlocks are present. This bulb complies fully with FDA radiation performance standard 21 CFR Subchapter J in the USA and SOR/DORS/80-381 guidelines in Canada.
• Electrical Interlocking: Always disconnect the primary power feed line at the main breaker panel before attempting inspection, maintenance, installation, or replacement tasks. Let the lamp cool for at least 15 minutes before handling to prevent severe contact burns.

Recommended Professional & Commercial Applications

• High-End Retail Display Lighting: Excellent for tracking systems or recessed spots inside high-end jewelry stores, luxury apparel boutiques, car showrooms, and art galleries.
• Architectural Facade Highlights: Ideal for building facades, historical columns, public monuments, and targeted landscape accents requiring bright, long-lasting cool white light.
• Commercial Downlights and Tracks: Well-suited for office lobbies, premium hotel corridors, reception common areas, and upscale restaurant accent positions.