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Osram Sylvania 64634 EFR 150W MR16 Halogen Light Bulb

Osram Sylvania 64634 EFR 150W MR16 Halogen Light Bulb

$7.25
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SKU:
64634 (54210) EACH
UPC:
4050300006819
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Product Description
High-output MR16 halogen reflector lamp for microscope, medical, and dental illumination.
SOSCleanroom
Overview

The Osram / Sylvania 64634 (EFR) is a precision 150W, 15V halogen lamp built in the MR16 reflector format to deliver focused, consistent illumination for equipment that depends on stable beam quality and repeatable optical performance. SKU: 64634 (54210).

Key Highlights
  • Electrical: 150W, 15V
  • ANSI Code: EFR
  • Base: GZ6.35
  • Shape: MR16 Reflector
  • Type of Current: AC
  • Working Distance: 1.260 in (32 mm)
  • Average Life: 50 hours
Typical Applications
  • Microscope illuminators and optical instruments
  • Medical and dental lighting systems using MR16 reflector lamps
  • Scientific and inspection equipment requiring controlled working distance and focused beam output
Handling Tip 
Halogen lamps run hot and are sensitive to surface contamination. Avoid touching the glass with bare hands. Use clean nitrile gloves and/or a lint-free wipe to minimize residue and reduce the risk of premature failure.
Industry Update (Branding & Supply Continuity)
Ushio announced an agreement to acquire ams OSRAM’s Entertainment & Industry Lamps (ENI) business, with closing anticipated by the end of March 2026. During and after a transition, customers may see changes such as branding, labeling, packaging, and distribution channels. Best practice: qualify by part number and critical specs (V/W, base, and MR16 form factor) to ensure continuity.
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Always confirm compatibility with your equipment model, required voltage, base type (GZ6.35), and working distance prior to installation.
The Technical Vault
By SOSCleanroom
Specs & Compatibility
Replacement Guidance Handling & Storage Cleanroom Considerations
Quick Specs
Manufacturer / Ordering Code Osram / Sylvania 64634 (EFR) | Mfg. Ordering Code: 54210 | UPC: 4050300006819
Lamp Type / Technology Halogen with Reflector (MR16)
Output / Spectrum Visible (continuous spectrum) with infrared component typical of halogen sources
Wattage / Voltage 150W / 15V
ANSI Code EFR
Base / Socket GZ6.35
Shape / Envelope MR16 Reflector
Type of Current AC
Working Distance 1.260 in (32 mm)
Average Life 50 hours
The Science: How a Halogen Bulb Produces Light
A halogen lamp is a form of incandescent light source. Electrical current passes through a tungsten filament, and the filament’s electrical resistance converts energy into heat. At operating temperature, the filament becomes white-hot and emits continuous-spectrum light (visible light plus infrared) due to thermal radiation.
The “halogen” advantage comes from the halogen cycle. Inside a quartz (high-silica) envelope, an inert fill gas is combined with a small amount of halogen (commonly iodine or bromine). Tungsten that evaporates from the filament can react with the halogen to form tungsten-halide compounds. Near the hotter filament region, these compounds dissociate and redeposit tungsten back onto the filament. This helps reduce glass blackening and supports higher filament temperatures for strong, stable output—while also requiring careful handling because the lamp operates at high temperature.
Industry Update: ams OSRAM ENI Business → Ushio (Expected Close by End of March 2026)
Ushio announced an agreement to acquire ams OSRAM’s Entertainment & Industry Lamps (ENI) business, with closing anticipated by the end of March 2026.
What this means for buyers: during and after the transition, customers may see changes in branding, part-number presentation, packaging, origin labeling, or channel availability. To reduce risk, qualify replacements by ANSI code (EFR), electrical specs (150W/15V), base (GZ6.35), and MR16 reflector format.
Common Cross-References (Verify Before Ordering)
Frequently referenced as: EFR, 64634, Philips 6423, GE EFR, Ushio EFR, Kondo EFR. Additional equipment/vendor references may include: Zeiss 31-01-98, Olympus 8S401, Volpi 10001-111, Wild/Leitz 997-053. Always confirm your equipment documentation and the working distance requirement.
Replacement & Handling Notes
  • Match electrical specs: use 150W / 15V only. Incorrect voltage can damage equipment or shorten lamp life.
  • Confirm base & format: GZ6.35 and MR16 reflector geometry are critical for fit and optical performance.
  • Keep the envelope clean: avo