Philips 13528 Focusline 15W 6V GZ4 Halogen MR11 Projection Lamp - Quartz-UV Open Face, 2900K Warm White

The Philips 13528 Focusline is a precision-engineered 15W 6V low-voltage halogen MR11 reflector lamp designed for demanding medical, projection, scientific, and specialized illumination systems. Featuring a bi-pin GZ4 base, open-face quartz-UV construction, and C-6 filament, it delivers 100 CRI warm white light at 2900K with excellent color rendering comparable to natural sunlight. The dichroic reflector directs heat backward, protecting sensitive optics and maintaining consistent performance throughout its 750-hour rated life. Ideal for retrofit applications requiring reliable, high-intensity, no-fuss halogen output in compact systems.

Key Specifications

• Wattage: 15W
• Voltage: 6V (low-voltage, requires transformer)
• Base Type: GZ4 (2-Pin Bi-Pin)
• ANSI Code: N/A
• Filament: C-6
• Initial Lumens: Not specified (typical ~200–300 lm for similar MR11 15W halogen projection lamps)
• Color Temperature: 2900K (Warm White / Halogen Glow)
• CRI (Color Rendering Index): 100
• Rated Average Life: 750 hours
• Burning Position: S105 (any position)
• Dimensions (MOL x Diameter): 40 mm × 35 mm (1.57" × 1.38")
• Bulb Type: MR11 Open-Face Quartz-UV Projection Lamp
• Philips Order Code: 13528

Product Features & Benefits

• Precision Alignment: Burner precisely aligned for optimal light performance and beam consistency.
• Dichroic Reflector: Directs heat backward to keep optical systems within temperature limits and protect components.
• Quartz-UV Open Face: High transmission for maximum UV output in specialized applications (e.g., medical/scientific).
• Exceptional Color Rendering: CRI 100 matches natural sunlight for accurate, true-to-life color reproduction.
• Consistent Output: Maintains high lumen output with minimal depreciation throughout life.
• Proven Reliability: Ideal for retrofit in medical, projection, dental curing (blue-filter variants available), and scientific equipment.

Recommended Applications

• Medical and surgical lighting systems
• Projection equipment and optical instruments
• Scientific and laboratory illumination
• Dental curing and UV-sensitive applications (special blue-filter versions)
• Microscope and endoscope light sources
• Specialized display and task lighting requiring precise, warm halogen output

Important Information

• Requires a compatible 6V low-voltage transformer (not line voltage).
• Handle with clean gloves — avoid touching the quartz envelope to prevent premature failure from skin oils.
• Ensure proper ventilation (halogens generate significant heat).
• Fully dimmable with compatible low-voltage dimmers and transformers.
• No mercury; recyclable where facilities allow.

Specialized low-voltage halogen projection lamp for critical medical, scientific, and optical applications—offers unmatched color accuracy and reliability. Modern LED MR11/6V equivalents provide similar output with 10,000–25,000+ hour life, cooler operation, and lower energy use—consider upgrading for reduced maintenance and heat.