PHILIPS 31490-6 | EFR 150W 15V Halogen | 3350K GZ6.35 Base

The Philips 31490-6 (ANSI Code: EFR) is a high-precision halogen reflector lamp from the Focusline series, specifically engineered for the demanding requirements of medical, scientific, and projection systems. Operating at 150 watts and 15 volts, this MR16-shaped lamp features a dichroic coating on its glass reflector, which dissipates approximately 75% of generated heat backwards, protecting sensitive optical components. With a 3350K warm white color temperature and a perfect 100 CRI, it provides the consistent, high-quality light output and faithful color rendering necessary for dental curing, endoscopy, and fiber optic illumination. The GZ6.35 2-pin base and precise filament alignment ensure a focused, distortion-free beam throughout the lamp's service life.

Product Overview

Designed as the primary 6423FO replacement for professional OEM equipment, this lamp utilizes quartz-UV open construction to deliver 840 initial lumens in a highly concentrated beam. The C-6 filament is strategically positioned within the reflector to provide optimal beam performance without the need for constant re-alignment during lamp changes. This makes it an essential component for high-precision tools such as ophthalmic instruments, surgical microscopes, and spectrography equipment. Its ability to maintain high lumen maintenance throughout its life ensures that visual conditions remain optimal for critical medical and industrial procedures.

• Dichroic Reflector: Minimizes thermal stress on optical systems by reflecting visible light forward while allowing IR heat to pass through the back.
• Extreme Precision: Burner is pre-aligned for a focused beam, essential for fiber optic entry and projection optics.
• Superior Color: Full-spectrum halogen light (100 CRI) allows for the most accurate identification of tissue and materials.
• Compact Form Factor: Standard MR16 (R50) shape fits into a vast range of specialty lighting housings.

Technical Specifications

• Brand: Philips Focusline
• ANSI Code: EFR
• Ordering Code: 6423FO (31490-6)
• LIF Code: A1/232
• Wattage: 150W
• Voltage: 15V
• Base Type: GZ6.35 (2-Pin)
• Bulb Shape: MR16 (R50)
• Color Temperature: 3350K / 3380K
• CRI: 100
• Initial Lumens: 840 lm
• Rated Average Life: 50 Hours
• Operating Position: P90/P15 (Horizontal ± 90° or Base Down)
• Dimensions: 1.65" MOL x 2.0" Diameter

Safety & Handling Information

• Transformer Check: This lamp operates strictly on 15 Volts. Ensure your equipment's transformer is calibrated correctly; even a small over-voltage can cause the lamp to fail instantly.
• No Bare Hands: Handle only by the reflector or with a lint-free cloth. Skin oils create hot spots on the quartz burner, leading to "blistering" or explosive failure.
• Cooling Requirements: This lamp reaches temperatures up to 900°C. Ensure all fixture ventilation and cooling fans are clear and functional.
• Fixture Rating: Use only in fully enclosed fixtures designed to contain a lamp rupture.

Primary Applications

• Medical & Dental: Endoscopy light sources, dental curing lights, and surgical headlamps.
• Microscopy: Brightfield and darkfield illumination for high-magnification scientific study.
• Fiber Optics: Coupling into small-diameter fiber optic bundles for industrial and medical use.
• Projectors: Replacement lamp for 8mm/16mm film projectors and microfiche readers.