Hamamatsu's (HPK) L2173 Xenon Lamp

is a 35 W short-gap xenon lamp designed and manufactured in Japan, with stable, broadband light output in demanding analytical and photometric systems. With a fused silica window and a published spectral distribution from 185 nm to 2000 nm, the L2173 supports ultraviolet, visible, and near-infrared work from a single lamp platform. With a 1 mm arc length, typical light output drift of ±0.5 %/h, and maximum fluctuation of 1 %, making this lamp a strong fit for applications that need repeatable optical performance rather than raw brightness alone. Its long-life design helps reduce replacement frequency and minimize interruptions tied to lamp changeouts and optical realignment. If you need a genuine Hamamatsu L2173 replacement xenon lamp for a NanoSpec instrument, spectrophotometer, optical measurement instrument, or custom integration project, ScienceLighting can help you confirm fit, accessory requirements, and ordering details before you buy.

Applications

Spectrophotometry and Optical Measurement

• UV-Vis and broadband optical measurement systems
• Spectrophotometers and photometric instruments
• Reference light source positions where output stability matters

Analytical and Environmental Instrumentation

• Instrument platforms that need continuous spectrum output from UV through IR
• Environmental analysis and laboratory detection systems
• Optical subsystems where a compact short-gap source improves coupling and alignment

Semiconductor and Electronics Evaluation

• Inspection and measurement tools requiring stable point-source illumination
• Optical test stations that benefit from broadband output
• Bench and OEM systems where lamp consistency supports repeatable results

Research and Instrument Development

• Custom optical setups and prototype instruments
• General laboratory research using UV-visible-near-IR illumination
• Replacement source needs for established Hamamatsu-based systems

Features

• Stable light output for repeatable work: Built for photometric use where drift and short-term fluctuation can directly affect data quality.
• Broad continuous spectrum: One lamp covers UV through infrared regions, helping simplify source selection for multi-band optical systems.
• Short-gap point-source performance: The compact emission geometry supports efficient optical design and easier integration into measurement instruments.
• Long-life design: Hamamatsu’s super-quiet xenon lamp platform is positioned to reduce maintenance events such as lamp replacement and post-change alignment work.
• Flexible mounting orientation: Supports both near-vertical and near-horizontal installation within published limits, giving more freedom in instrument layouts.
• Convection-cooled operation: Natural air cooling can simplify system design compared with lamps that require forced cooling.
• Genuine Hamamatsu replacement option: Ideal when you want to maintain published lamp characteristics rather than substitute with an unknown equivalent.

Specifications

Dimensional Outline

Optional Accessories

• Hamamatsu C11522 Series OEM Power Supply and Starter — Hamamatsu publishes a 3.5 A configuration suitable for 35 W xenon lamp operation.
• Lamp housing options — Hamamatsu’s C11522 literature references operation with E2419 series or E2420 lamp housing families; exact L2173 housing selection should be confirmed before publishing or quoting. [NOTE TO REVIEW]
• Application matching support — Ask ScienceLighting to confirm lamp, power supply, housing, and system compatibility before purchase if you are replacing a lamp in an existing instrument or specifying parts for OEM integration.

FAQs

What is the Hamamatsu L2173 xenon lamp used for?

The Hamamatsu L2173 is used as a stable broadband light source in photometric and analytical instruments, including spectrophotometers, optical measurement systems, and other equipment that benefits from continuous output from the UV through the IR region.

What wavelength range does the L2173 cover?

Hamamatsu specifies the L2173 with spectral distribution from 185 nm to 2000 nm, giving it useful coverage across ultraviolet, visible, and near-infrared regions.

Is the L2173 a short-gap xenon lamp?

Yes. Hamamatsu identifies the L2173 as a short-gap xenon lamp and lists a 1 mm arc length, which supports point-source style optical design.

What are the electrical operating specifications for the L2173?

The published lamp rating is 35 W with a lamp current of 3.5 A ±0.2 A, lamp voltage of 11 V, minimum supply voltage of 50 V dc, and trigger voltage of 15 kV.

How stable is the Hamamatsu L2173 xenon lamp?

Hamamatsu publishes typical light output drift of ±0.5 %/h and maximum fluctuation of 1 % (p-p), which is why this model is attractive for measurement-focused optical systems.

How long does the L2173 typically last?

Hamamatsu lists a guaranteed operation life of 1000 hours and an average life of 2000 hours for the L2173.