Osram 64615 HLX EFN 75W 12V GZ6.35 MR16 Xenophot White Dichroic Halogen Reflector Lamp — NAED 54126 — Dental, Medical & Projection

Specifications

• Bulb Type: MR16 White Dichroic (Cold Mirror) Reflector — Clear Face
• ANSI Code: EFN
• LIF Code: A1/230
• Trade Name: Xenophot HLX
• Osram Order Code: 64615 HLX
• NAED / Sylvania Ordering Code: 54126
• Osram EAN / Product Code: 4050300006796
• Wattage: 75W
• Voltage: 12V (Low Voltage)
• Base Type: GZ6.35 Bi-Pin (2-Pin, 6.35mm pin spacing)
• Color Temperature: 3,200K–3,350K (Warm White — see note)
• Color Rendering Index (CRI): 100 (Perfect color accuracy)
• Average Rated Life: 50 Hours
• Filament Design: C-8 (Single Coil Axial)
• Bulb Finish: Clear open face with white dichroic reflector
• Max Overall Length (MOL): 42.0 mm (1.653 in)
• Focal Length / Working Distance: 32.0 mm (1.26 in)
• Bulb Diameter: 51.0 mm (2.0 in)
• Burn Position: Horizontal ±15° Only (p90/p15)
• Dimmable: Yes
• RoHS Compliant: Yes

The Osram 64615 HLX is a single-ended, low-voltage Xenophot tungsten halogen MR16 reflector lamp engineered for demanding dental curing, medical imaging, microscopy, fiber optic illumination, and 8mm projection applications. Its xenon gas fill delivers up to 10% greater luminous efficiency versus standard halogen at the same wattage. The white dichroic (cold mirror) reflector passes infrared heat forward through the back of the lamp while directing cool visible light toward the subject — a critical feature for heat-sensitive dental and medical procedures. With a perfect CRI of 100, precision filament alignment, and instant-on performance, it is a trusted standard replacement across a wide range of professional equipment.

Understanding the White Dichroic (Cold Mirror) Reflector

A standard reflector lamp directs both visible light and infrared heat toward the subject. The white dichroic reflector in this lamp works differently — it reflects visible light forward toward the work area while allowing infrared (heat) radiation to pass through the back of the reflector and dissipate away from the subject. This "cold light" effect is especially important in dental curing and surgical applications, where minimizing heat at the point of illumination protects both patients and sensitive materials.

What Makes Xenophot (HLX) Different?

Standard halogen lamps use krypton as the filling gas. Osram's Xenophot lamps substitute xenon, which reduces the rate of tungsten evaporation and allows the filament to operate at a higher temperature. This produces up to 10% more lumens per watt compared to a conventional halogen of the same wattage, and delivers nearly constant luminous flux throughout the lamp's rated life. Xenophot lamps are identified in Osram's catalog by the prefix HLX.

Confirmed Compatible Equipment

This lamp is a verified replacement for the following equipment models:

• Dentsply Dental — 3035, Perspective, Retrospective
• EFOS Dental — 3035, Perspective, Retrospective
• Johnson & Johnson Dental — Fotofill
• LD Caulk Dental — 3035, Perspective, Retrospective
• Sygnus Imaging Dental — Stylus 2000, Stylus 240
• 8mm Projectors (standard A1/230 format)

Professional Applications

• Dental Curing & Examination Equipment
• Surgical & Medical Overhead Lighting
• Microscopy & Laboratory Instruments
• Fiber Optic Illuminators
• UV Curing Equipment
• 8mm Film & AV Projectors
• Endoscopy & Ophthalmic Instruments
• Club, Disco & Stage Lighting

Cross-Reference Part Numbers

This lamp is interchangeable with equipment specifying the following part numbers:

• Osram / Sylvania: 64615 HLX / NAED 54126
• GE / Tungsram: GE 41252 / EFN
• Ushio: 1000270 / JCR12V-75W
• Philips: 31502-8 / 315028 / 13139 / 335455
• Eiko: 10234 / 21277

Important Safety & Installation Notes

• Burn Position is Critical: This lamp must be operated horizontally within ±15° of true horizontal only. Installing at any other angle will cause overheating, dramatically shorten lamp life, and may cause lamp failure.
• Short Rated Life is By Design: The 50-hour lifespan is normal and expected for high-intensity medical and dental halogen lamps. The trade-off for CRI 100, precise optical output, and cold mirror performance is a shorter service interval. Stocking spare lamps is strongly recommended.
• Enclosed Fixtures Only: Must be used exclusively in approved, fully enclosed halogen fixtures. Do not use in open or unshielded housings.
• No Bare Hands: Never touch the lamp envelope or the surface of the reflector with bare skin. Oils from your fingers create hot spots that cause premature failure. Use clean gloves or a lint-free cloth during installation.
• Verify Working Distance: The focal length of this lamp is 32mm. Equipment calibrated for a different focal length will not perform correctly. Always match the replacement lamp's working distance to your equipment's specification.