Philips Focusline EVC 250W 24V G6.35 Photo-Optic Halogen Lamp – ANSI EVC | CRI 100 | 300-Hour Life | 55mm MOL | Specialty Photo-Optic

The Philips Focusline EVC (Type 6958, FGX) is a 250-watt 24-volt quartz halogen photo-optic lamp with CRI 100, G6.35 bipin base, and 300-hour rated life. Precise filament positioning, full-spectrum halogen technology, and quartz construction make this the genuine Philips replacement lamp for medical, projection, microscopy, and specialty photo-optic equipment where exact beam performance and distortion-free light quality are required. SKU: PHI-5968EVC.

Quick Specs

• Brand: Philips Focusline
• SKU / Order Code: PHI-5968EVC
• ANSI Code: EVC
• LIF Code: C
• Lamp Type: Quartz Halogen — Photo-Optic
• Wattage: 250W
• Voltage: 24V
• Base Type: G6.35 Bipin
• CRI: 100 (full-spectrum halogen)
• Rated Average Life: 300 hours
• Overall Length (MOL): 55mm
• Bulb Diameter: 13.5mm
• Bulb Type: Quartz Halogen
• Fixture Requirement: Approved Enclosed Halogen Fixtures Only
• Initial Lumens: Verify with manufacturer specification sheet
• Color Temperature: Verify with manufacturer specification sheet
• Burn Position: Verify with manufacturer specification sheet

Product Overview

The Philips Focusline EVC (Type 6958, FGX designator) is a 250-watt 24-volt quartz halogen photo-optic lamp built for precision specialty applications in medical, scientific, projection, and microscopy equipment. Photo-optic halogen lamps are not general lighting sources — they are designed to exacting mechanical and optical tolerances where filament position, beam geometry, and spectral output characteristics must exactly match the original equipment specification.

CRI 100 is the defining optical property of halogen technology: halogen lamps emit continuous-spectrum light with no gaps or spikes, rendering all colors with perfect accuracy across the visible spectrum. For medical imaging, scientific microscopy, photographic projection, and precision inspection applications, CRI 100 full-spectrum output is a technical requirement — not merely a quality preference. No other lamp technology achieves CRI 100.

Philips Focusline lamps feature precise filament positioning for optimal beam performance — the filament sits in a defined optical position within the envelope, ensuring that the equipment’s reflector and optical system receive the arc or filament exactly where the design requires. Consistent lumen output is maintained throughout the 300-hour rated life. Quartz construction withstands the high operating temperatures generated by 250W at 24V in an enclosed optical housing.

Important note on rated life: The 300-hour rated life is normal for photo-optic halogen lamps at this wattage and voltage. These lamps operate at high intensity within precision optical equipment — the short rated life is a function of the high wattage density required for the photometric performance, not a quality deficiency. Ensure adequate lamp stock on hand for the equipment’s maintenance cycle.

Why Choose This Product

• Genuine Philips Focusline — OEM-quality replacement: Philips Focusline is the trusted OEM replacement brand for precision medical, scientific, and projection equipment worldwide. Using genuine Philips photo-optic lamps maintains the optical system performance and safety certification of the original equipment.
• CRI 100 — perfect color accuracy: Continuous-spectrum halogen light output renders all colors with absolute accuracy — the only lamp technology that achieves CRI 100. Required for medical imaging, microscopy, photographic, and color-critical inspection applications.
• Precise filament positioning — beam consistency: Focusline lamps are manufactured to tight filament position tolerances, ensuring the optical system receives consistent, correctly positioned illumination. Off-spec lamps with imprecise filament placement degrade beam quality and system performance.
• Quartz construction — high-temperature stability: Quartz halogen envelope withstands the high operating temperatures generated by 250W in a compact enclosed housing — maintains dimensional stability and optical clarity throughout rated life.
• Consistent lumen output throughout rated life: Halogen regenerative cycle maintains filament integrity, delivering stable lumen output rather than the progressive depreciation seen in incandescent lamps.
• ANSI EVC specification — verified compatibility: The EVC ANSI code defines the exact electrical and photometric parameters for this lamp class. Specifying by ANSI code rather than wattage alone ensures correct replacement in compliant equipment.

Technical Specifications

Dimensions

Applications

The Philips Focusline EVC 250W/24V is a specialty photo-optic lamp — not a general lighting source. It is specified as a direct replacement lamp in precision equipment requiring ANSI EVC-rated halogen performance:

• Medical and surgical equipment – Examination lights, surgical illuminators, endoscopy light sources, and medical imaging systems requiring continuous-spectrum CRI 100 illumination with precise filament positioning for consistent optical performance.
• Scientific microscopy – Transmitted and reflected light microscopes, pathology examination systems, and laboratory analysis equipment where halogen illumination at defined color temperature and filament position is specified by the equipment manufacturer.
• Photographic and cinematic projection – Film projectors, slide projectors, and optical printing equipment requiring ANSI EVC lamp specifications for correct exposure and color balance.
• Precision inspection and measurement – Optical metrology, quality control illumination, and inspection systems where full-spectrum CRI 100 output and consistent lumen output throughout lamp life are required for accurate measurement results.
• Specialty photo-optic equipment – Any OEM equipment specifying ANSI EVC, 250W/24V, G6.35 base halogen lamp replacement — verify against your equipment’s original lamp specification before ordering.

Replacing Your Current Photo-Optic Halogen Lamp?

Photo-optic halogen lamps are specification-critical replacements. Confirm all of the following before ordering:

• ANSI code — EVC: Verify your equipment specifies an ANSI EVC lamp. Photo-optic halogen ANSI codes define exact wattage, voltage, base type, and optical characteristics — adjacent codes (EVD, EWG, etc.) are not electrically or optically interchangeable even if they appear physically similar.
• Voltage — 24V: This lamp operates at 24V. Verify your equipment’s power supply or transformer output is exactly 24V. Operating above rated voltage significantly reduces lamp life and risks premature failure. Verify transformer output with a voltmeter before installation.
• Wattage — 250W: Verify your equipment is rated for a 250W lamp. Do not substitute a different wattage lamp — equipment reflectors and thermal management are designed for the specified lamp wattage.
• Base type — G6.35 bipin: Verify your equipment’s lamp socket accepts G6.35 bipin lamps. Some photo-optic equipment uses GY6.35 or other bipin designations — confirm the correct pin spacing before ordering.
• Burn position: Verify acceptable burn positions with the equipment manufacturer’s service documentation — photo-optic halogen lamps often have position-sensitive filament requirements that affect both optical performance and lamp life.
• Do not touch the bulb with bare hands: Skin oils on the quartz envelope cause hot spots that lead to premature failure. Use clean gloves or a lint-free cloth during installation.

Safety and Installation Guidelines

• Enclosed fixtures only: Must be used in approved, fully enclosed halogen fixtures. Do not use in open or unshielded housings.
• No bare hands: Never touch the bulb envelope with bare skin. Skin oils cause hot spots that lead to premature failure. Use clean gloves or a lint-free cloth during handling and installation.
• Do not exceed rated voltage: Operating above 24V dramatically shortens lamp life. Verify your equipment transformer output matches the lamp’s rated voltage before installing.
• Extreme heat warning: This lamp operates at very high temperatures. Never touch when lit or recently switched off. Keep all combustible materials away from the lamp and fixture.
• Fragile — handle with care: Quartz halogen lamps are sensitive to vibration and impact. Inspect the envelope for cracks before installation. Do not install a damaged lamp.
• Follow the equipment manufacturer’s service documentation for lamp replacement procedures specific to your equipment model.

Ordering Information

• Brand: Philips Focusline
• SKU / Order Code: PHI-5968EVC
• ANSI Code: EVC
• Lamp Type: 250W 24V Quartz Halogen Photo-Optic
• Base: G6.35 Bipin
• Case quantities and bulk pricing: Contact ADL Supply for volume orders.

Compliance and Certifications

• Verify RoHS compliance status with manufacturer specification sheet.
• Verify applicable medical or safety certifications with manufacturer specification sheet for your specific equipment application.
• Verify Prop 65 warning requirements with manufacturer specification sheet.

ADL Supply recommends confirming all applicable compliance data with the Philips official product data sheet prior to specification or installation. For medical equipment applications, verify lamp compatibility with your equipment manufacturer’s service documentation before ordering.