PHILIPS 55W TL5C Circular | 4000K Cool White | 2GX13 4-Pin Base | MASTER TL5

Philips MASTER TL5C Circular 55W/840 (Order Code: 16592-8) is a high-output, slim-profile fluorescent ring lamp designed for architectural and decorative luminaires. Featuring a 16mm (T5) tube diameter, this lamp enables fixture designs to be up to 45% smaller than traditional T9 systems while delivering superior light quality. With a 4000K cool white color temperature and an 85 CRI, it provides a crisp, professional atmosphere ideal for modern commercial and office spaces.

Product Overview

The Philips MASTER TL5 Circular series is engineered for circular symmetry in light distribution, avoiding the shadows often found in linear lamp arrangements. The slim 16mm tube allows for extremely flat luminaire designs and provides designers with freedom in creating aesthetic lighting solutions. Utilizing high-efficiency phosphors, this lamp maintains high lumen output throughout its 12,000-hour rated life. Optimized for use with Programmed Start electronic ballasts, the TL5C ensures reliable, flicker-free operation while reducing maintenance and replacement costs.

• Slim Architectural Design: The 16mm (T5) tube diameter is significantly thinner than standard T9 circline lamps, allowing for sleek, low-profile fixtures.
• High Color Quality: An 85 CRI ensures that interior spaces, merchandise, and skin tones are rendered accurately and vibrantly.
• Circular Symmetry: Provides a uniform 360-degree light wash, making it perfect for shallow recessed ceiling fixtures and modern pendants.
• Programmed Start Compatibility: Designed for electronic gear that pre-heats the electrodes, significantly extending lamp life in high-frequency switching environments.

Technical Specifications

• Brand: Philips MASTER TL5C Circular
• Model: TL5C 55W/840 (165928)
• Wattage: 55W
• Base Type: 2GX13 (4-Pin)
• Color Temperature: 4000K (Cool White)
• Color Rendering Index (CRI): 85
• Tube Diameter: 16mm (T5)
• Nominal Ring Diameter: 12 inches (300mm)
• Rated Average Life: 12,000 Hours
• Technology: Fluorescent High Output (HO)

Compatibility & Application

• Ballast Requirement: Must be operated on a Programmed Start Electronic Ballast. Not compatible with magnetic ballasts or standard T9 circline gear.
• Base Identification: Features the 2GX13 4-pin base, which is specifically designed for TL5 circular lamps. Verify your fixture uses this base rather than the larger G10q base found on T9 lamps.
• Ideal For: Public buildings, professional offices, modern restaurant lighting, and high-end retail displays.
• Hospitality: Widely used in hotel lobbies and guest rooms within contemporary circular pendants and wall-mounted fixtures.

Additional Information

The Philips 16592-8 represents a step forward in lighting efficiency and aesthetics. By transitioning from T9 to TL5 circular technology, facilities can enjoy a more modern look with a reduced physical footprint. The "Cool White" 4000K spectrum is the standard for productivity-focused environments, providing a clean and bright light that enhances focus. For installations requiring consistent color across multiple rooms, the MASTER TL5C series offers excellent color stability throughout the life of the lamp.