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Osram Sylvania HLX 64250 FHE/ESB 20W Halogen Light Bulb

Osram Sylvania HLX 64250 FHE/ESB 20W Halogen Light Bulb (10 Pack)

$29.50
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SKU:
FHE/ESB (54261)
UPC:
4050300012407
Availability:
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Shipping:
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Product Description
Compact, instrument-grade HLX/XENOPHOT halogen capsule for microscopy and precision optical illumination.
SOSCleanroom
Overview

The Osram / Sylvania HLX 64250 (ANSI code FHE/ESB) is a compact 20W, 6V low-voltage halogen lamp designed for stable illumination in microscopes and other precision optical instruments. “HLX” identifies OSRAM’s XENOPHOT technology (xenon fill gas), supporting strong performance and improved lumen maintenance in demanding applications. This listing is a pack of 10. SKU: FHE/ESB (54261).

Key Highlights
  • Electrical: 20W, 6V
  • ANSI Code: FHE/ESB
  • Mfg. Ordering Code: 54261
  • Base: 2-pin (G4)
  • Shape: T3.5
  • Length (MOL): 1.2 in
  • Initial Light Output: 480 lm
  • Average Life: 100 hours
  • Filament: C-6 tungsten
  • UPC: 4050300012407
  • Pack Quantity: 10 bulbs
Typical Applications
  • Microscope illuminators and optical instruments
  • Medical/scientific inspection equipment using low-voltage capsule lamps
  • Precision lighting assemblies where size, base fit, and consistent output matter
Handling Tip 
Halogen capsules 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:
In July 2025, Ushio and ams OSRAM announced an agreement for Ushio to acquire ams OSRAM’s Entertainment & Industry Lamps (ENI) business, with closing expected by the end of March 2026. During and after transitions in specialty lamp portfolios, customers may see changes such as labeling, packaging, and distribution channels. Best practice: qualify replacements by the manufacturer ordering code and critical specs (20W/6V, G4, and T3.5 geometry), and retain HLX 64250 / FHE/ESB / 54261 in maintenance records.
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Always confirm compatibility with your equipment model, required voltage (6V), wattage (20W), base type (G4), and capsule geometry prior to installation.
The Technical Vault
By SOSCleanroom
Specs & Compatibility
Replacement Guidance Handling & Storage Cleanroom Considerations
Quick Specs
Manufacturer / Ordering Code Osram / Sylvania HLX 64250 | ANSI: FHE/ESB | Mfg. Ordering Code: 54261 | UPC: 4050300012407 | Pack: 10 bulbs
Lamp Type / Technology Low-voltage tungsten halogen capsule (HLX / XENOPHOT xenon fill)
Wattage / Voltage 20W / 6V
Base / Socket 2-pin G4
Shape / Envelope T3.5 | MOL: 1.2 in
Output / Life Initial: 480 lm | Avg life: 100 hours | Filament: C-6 tungsten
HLX / XENOPHOT Note (Why It Matters)
“HLX” identifies OSRAM’s XENOPHOT halogen technology where xenon replaces krypton as the fill gas. In many optical applications, xenon can reduce tungsten vaporization and support higher filament temperature—helping maintain output and stability over the lamp’s service life.
The Science: How a Halogen Bulb Produces Light
A halogen lamp is a type of incandescent source. Electrical current heats a tungsten filament until it becomes white-hot, producing continuous-spectrum light (visible plus infrared) through thermal radiation.
The “halogen” advantage comes from the halogen cycle inside a quartz (high-silica) envelope: a small amount of halogen (often iodine/bromine) reacts with evaporated tungsten and helps transport it back toward the filament where it redeposits. This reduces envelope blackening and supports consistent output—while also driving high operating temperatures.
Industry Update: ams OSRAM ENI Business → Ushio (Expected Close by End of March 2026)
Ushio and ams OSRAM announced an agreement for Ushio to acquire ams OSRAM’s Entertainment & Industry Lamps (ENI) business, with the transaction expected to close by the end of March 2026.
What this means for buyers: across certain specialty lamp lines, customers may encounter changes in labeling, packaging, or channel availability during the transition. To reduce risk, qualify replacements by 20W/6V, G4, and capsule geometry, and keep the manufacturer ordering code (54261) in maintenance records.
Replacement & Handling Notes
  • Match electrical specs: use 6V and 20W only. Voltage mismatches can cause immediate overheat/failure.
  • Confirm base & geometry: G4 fit and filament positioning affect beam quality and coupling into optical paths.
  • Keep the envelope clean: fingerprints/residues can create localized hot spots. Use clean nitrile gloves and/or a lint-free wipe.
  • Pack management: this is a 10-pack; store spares sealed and clean to reduce contamination during maintenance events.
Cleanroom Considerations

Treat lamp changes as a controlled maintenance step: minimize packaging debris, use low-lint handling materials, and keep the capsule free of oils and particulates prior to powering the instrument.

Stage clean nitrile gloves and a cleanroom-grade lint-free wipe during installation to reduce contamination risk and prevent residue transfer to nearby optics.

Need deeper specs or cross-references?
If you need additional information please try our SOSCleanroom specific AI ChatBot which draws from our extensive cleanroom specific libraries.
For mission-critical optical systems, confirm OEM requirements (voltage, wattage, base type, filament positioning, and thermal limits) prior to use.