Product Overview
Sylvania 64978 MC39TF/U/GU6.5/930 | 39W Ceramic Metal Halide | GU6.5 Base
Sylvania Metalarc Powerball 39W Ceramic Metal Halide Lamp Part #: 64978
GU6.5 Twist-Lock Base | 3000K Warm White | 90 CRI | 3600 Lumens
Technical Specifications
Product CodeMC39TF/U/GU6.5/930
Ordering Code64978
ANSI CodeC130/E
Wattage39W
Lamp TypeT4 Ceramic Metal Halide (Clear)
Base TypeGU6.5 Twist-Lock
Color Temperature3000K (830) Warm White
Color Rendering Index (CRI)90
Initial Lumen Output3,600 lumens
Luminous Efficacy92 lm/W
Maximum Overall Length (MOL)2.24 inches (57mm)
Light Center Length (LCL)1.38 inches (35mm)
Bulb Diameter0.51 inches (13mm)
Rated Average Life15,000 hours
Burn PositionUniversal
Operating ModePulse Start
UV ProtectionUV-Stop Quartz (reduced UV output)
Product Identification
DescriptionMC39TF/U/GU6.5/930
UPC046135649783
Alternative Part Numbers69044 (International variant)
Recommended BallastsSylvania 51989 (QTP1X39MH SM UNV J) or 51990 (QTP1X39MH SM UNV F)
Installation Requirements
- Enclosed Fixtures Only: Must be used in enclosed luminaires
- Thermally Protected Ballast: Requires a thermally protected ballast for safety
- Minimum Open-Circuit Voltage: 209V RMS (230V nominal)
- Socket Rating: Use 4,000V pulse-rated sockets only
- UV Protection: UV-Stop quartz construction for reduced UV output
- Overcurrent Protection: Provide appropriate overcurrent protection in circuit
Critical Safety Notice
Warning: If the outer envelope is broken or punctured, this lamp can emit short-wave UV radiation that may cause skin burns and eye inflammation.
Mandatory Safety Precautions
- Do not use where people remain for long periods without adequate UV shielding
- Ensure protective shielding is installed and intact at all times
- Consider auto-extinguishing lamps in high-risk areas
- Complies with FDA 21 CFR Subchapter J (USA) and SOR/DORS/80-381 (Canada)
- Fixture must be rated for ceramic metal halide operation
Key Features & Benefits
- Superior White Light: Powerball ceramic arc tube technology delivers crisp, bright illumination
- Excellent Color Rendering: 90 CRI yields natural colors perfect for retail and display
- Long Life: 15,000 hour rated life reduces maintenance costs
- Universal Operation: Can be operated in any burn position
- Pulse Start Technology: Faster warm-up and better lumen maintenance
- Stable Color: Maximum color shift of only ±150K over lamp life
- High Efficacy: 92 lumens per watt for energy efficiency
Recommended Applications
- Accent and track lighting
- Retail display lighting
- Display and facade lighting
- Indirect luminaires
- Commercial downlights
- Architectural highlighting
