OSRAM 64643 FDS (XENOPHOT HLX) - 150W 24V GY9.5 bi-pin halogen lamp for fiber optics, microscopy and medical applications
The OSRAM 64643 FDS , from the XENOPHOT HLX family, is a reflectorless, low-voltage halogen lamp with a GY9.5 base, specially designed for medical fiber optics, microscopy, laboratory, UV curing , and technical lighting applications. Its xenon filling (HLX technology) offers up to 10% more luminous flux compared to a standard halogen lamp of the same wattage, while maintaining instant start-up and stable performance throughout its lifespan. It delivers 5,000 lm at 3,450 K (CRI ~100), with a 33.5 mm LCL , a total length of 57 mm , and a 15 mm diameter , ensuring direct replacement in compatible lamp heads and equipment. It features an S90 burn-in position and is dimmable with suitable 24 V power supplies. Rated life: 100 hours .
Main features
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Power / voltage: 150 W, 24 V AC
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Base: GY9.5 (bi-pin, pre-focus)
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Luminous flux: 5,000 lm
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Color temperature: 3,450 K (neutral warm white for instrumentation)
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Color Rendering Index (CRI): ≈100
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Dimensions: Ø 15 mm; length 57mm
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LCL (Light Center Length): 33.5mm
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Filament: 6.0 × 3.0 mm; filament length 6.0mm
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Nominal lifespan: 100 h
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Burning position: s90
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Dimmable: Yes (adjustable)
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HLX Technology (xenon filling): up to +10% flow compared to standard halogens
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Reference codes: ANSI FDS; LIF A1/262
Product benefits
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More light with the same power: XENOPHOT HLX technology delivers up to 10% more lumens than a conventional 150W halogen lamp.
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True color for diagnosis and research: CRI ≈100 and CCT 3,450 K, ideal for critical visualization.
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Instant start and stable light: immediate response and virtually constant flow throughout its life.
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Direct interchange: compact format with GY9.5 and LCL 33.5 mm compatible with numerous fiber optic heads and scientific equipment.
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Simple regulation: adjustable operation with suitable 24V transformers/controllers.
Use cases
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Medical and dental fiber optics: light sources for endoscopy, field illumination and auxiliary surgical lamps.
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Microscopy and laboratory: transmitted or reflected illumination in research and analysis systems.
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UV curing and instrumentation: curing equipment and optical benches that use 24V halogen capsules.
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Special luminaires: technical projectors and reflectorless luminaires that require GY9.5.
Frequently Asked Questions
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Does this part number include infrared (XIR) coating? No. The 64643 FDS is the HLX (xenon) version. OSRAM offers XIR variants with IR coating that further improve efficiency (up to +30%); if you require XIR, please check the specific part number.
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Can it be regulated? Yes, it is adjustable with compatible 24V equipment/transformers.
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How do I confirm compatibility? Check your equipment for the following specifications: 24V, 150W, GY9.5 base , and 33.5mm LCL . If these match, the 64643 is usually the correct part number.
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What does “s90” mean? It is the burn-in position indicated by the manufacturer for this lamp. Respect this setting to ensure longevity and performance.
Notes and recommendations
- Use only in enclosed luminaires and equipment suitable for halogen lamps, following the manufacturer's warnings.
- Avoid touching the quartz bulb with your hands: residue can shorten its lifespan.
- Check heat dissipation and ventilation in the lamp housing.
Project description
OSRAM 64643 FDS (XENOPHOT HLX) reflectorless halogen lamp; 150 W, 24 V AC; GY9.5 base; 5,000 lm flux; 3,450 K , CRI ~100; LCL 33.5 mm ; length 57 mm; diameter 15 mm; filament 6.0 × 3.0 mm (length 6.0 mm); position s90 ; rated life 100 h; dimmable.
