PHILIPS 315929 | EKE 150W 21V | MasterColor Focusline MR16 Halogen Lamp

The Philips 315929 (EKE 150W 21V) is a high-performance photo-optic halogen lamp designed for precision illumination in medical, scientific, and projection systems. Part of the Focusline series, this MR16 lamp features a facetted dichroic reflector that ensures approximately 75% of generated heat is dissipated backwards, protecting sensitive optical components from thermal damage. With a 3250K color temperature and a perfect 100 CRI, it provides distortion-free, full-spectrum light that is essential for accurate color rendering in endoscopy, microscopy, and surgical applications. Engineered for reliability, the 13629 type burner is precisely aligned to deliver a consistent 900 lumens and peak intensity throughout its operating life.

Product Overview

The Philips EKE 150W 21V lamp is the industry-standard choice for fiber optic illumination and specialty projection. Its smooth facetted reflector provides a uniform beam pattern, while the quartz-UV open bulb material ensures maximum light transmission. This lamp is specifically optimized for a working distance of 44.45mm (1.75"), making it a critical component for many OEM medical devices and laboratory instruments. Because it operates on a precise 21V circuit, it is frequently used in high-intensity applications where color accuracy is non-negotiable. Its compact MR16 shape allows it to fit into localized, space-restricted fixtures while maintaining heavy-duty performance.

• Dichroic Reflector: Diverts heat away from the illuminated object, ideal for heat-sensitive biological or archival specimens.
• Precise Alignment: The internal filament is centered to within strict tolerances for maximum optical efficiency.
• Dimmable: Compatible with equipment featuring variable intensity controls.
• Multi-Brand Compatibility: Direct professional replacement for Osram, Sylvania, and Ushio EKE types.

Technical Specifications

• Brand: Philips Focusline / Photo-Optic
• Order Code: 315929 (Type 13629)
• ANSI Code: EKE (EKE-ENA)
• Wattage: 150W
• Voltage: 21V
• Base Type: GX5.3 (Round 2-Pin)
• Initial Lumens: 900 lm
• Rated Average Life: 200 Hours
• Color Temperature: 3250K
• CRI: 100
• Dimensions: 1.75" (44.5mm) MOL x 2.0" (50.7mm) Diameter
• Burn Position: S90 (Standing +/- 90°)

Safety & Installation Guide

• Fixture Rating: Use only in approved enclosed fixtures. Halogen lamps operate under high pressure and can shatter if the glass is compromised.
• Handling: Do not touch the bulb glass with bare hands. Skin oils create hot spots that cause the quartz to bubble and explode. Use the original packaging or a clean cloth during installation.
• Voltage Regulation: This lamp is rated for 21 Volts. Operating it even slightly above this voltage will significantly reduce its 200-hour lifespan.
• Cooling: Ensure the fixture's cooling fan is operational, as this lamp reaches temperatures up to 900°C.

Primary Applications

• Medical & Dental: Endoscopy light sources, dental curing units, and surgical headlamps.
• Scientific: Laboratory microscopes, spectrography, and fiber optic cold-light sources.
• Projection: 8mm film projectors, slide projectors, and microfiche readers.
• Industrial: Machine vision, borescope inspection, and fiber optic display systems.