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Osram Sylvania G25T8 25W 18" UV Germicidal Lamp

Osram Sylvania G25T8 25W 18" UV Germicidal Lamp

$7.10
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SKU:
G25T8 (55197) EACH
UPC:
4008321398857
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Product Description
Compact T8 UV-C germicidal lamp for properly engineered air, water, and surface sanitation systems.
SOSCleanroom
Overview

The Osram Sylvania G25T8 is a 25W UV germicidal lamp in an 18" class T8 format, commonly used in enclosed UV systems designed to inactivate microorganisms (bacteria, mold, and viruses) in air and water purification and controlled surface-treatment applications. SKU: G25T8 (55197).

Key Highlights
  • Electrical: 25W, 46V
  • Mfg. Ordering Code: 55197
  • Base Type: G13 Miniature Bi-Pin
  • Dimensions: 436mm length; 25.5mm diameter
  • Average Life: 8,000 hours
  • Case Quantity: 25 bulbs
  • UPC: 4008321398857
Typical Applications
  • Air and water purification systems (fixture/system dependent)
  • Food processing, medical facilities, and air conditioning systems
  • Pharmaceutical production and clean rooms
  • Photochemistry, phototherapy, dermatology, sterilization, and disinfection (OEM specified)
Handling Tip 
Protect your eyes and skin when operating germicidal lamps. Use only in fixtures designed to completely screen or filter UV-C radiation. Avoid touching the glass with bare hands; use clean nitrile gloves and/or a lint-free wipe to minimize residue and help maintain output.
About Osram / Sylvania
OSRAM’s Display/Optic specialty-lamp operations serve diverse markets including entertainment and cinema projection, information display, medical/scientific, semiconductor fabrication, and airfield/aircraft applications.
Industry Update:
In July 2025, Ushio announced an agreement to acquire ams OSRAM’s Entertainment & Industry Lamps business, with closing anticipated by the end of March 2026. During and after transitions, customers may see changes such as labeling, packaging, part-number presentation, and distribution channels. Best practice: qualify replacements by the manufacturer code and critical specs (55197, 25W, 46V, G13 bi-pin, and 436mm length) to maintain continuity.
Need help selecting the right product?
If you need additional information please try our SOSCleanroom specific AI ChatBot which draws from our extensive cleanroom specific libraries.
Always confirm compatibility with your fixture/ballast, base type (G13 bi-pin), and required dimensions (length/diameter) prior to installation.
The Technical Vault
By SOSCleanroom
UV-C Germicidal Science & System Design
Air, Water & Surface UVGI Dose (Fluence) Ballast & Thermal Window Safety & Maintenance
Quick Specs
Product Osram Sylvania G25T8 | Mfg. Code: 55197 | SKU: G25T8 (55197)
Electrical 25W | 46V
Format T8 linear germicidal lamp (18" class)
Base G13 Miniature Bi-Pin
Dimensions 436mm length | 25.5mm diameter
Life / Pack 8,000 hours (avg.) | Case: 25 bulbs
Why UV-C Works: The Germicidal Mechanism
Germicidal UV (commonly called UVGI) inactivates microorganisms by causing photochemical damage to DNA and/or RNA. When microbes absorb UV-C, key molecular bonds are disrupted, which prevents replication—meaning the organism can no longer reproduce and is effectively inactivated.
Many installed UVGI systems are designed around the 254nm class output produced by traditional germicidal lamp technology. The performance driver is delivered dose (also called fluence): UV intensity at the target multiplied by exposure time.
How Germicidal Lamps Produce UV-C (Engineering Overview)
Germicidal lamps are typically low-pressure mercury discharge sources. A ballast/driver initiates and controls an electrical discharge through mercury vapor. The excited mercury emits strong UV radiation; germicidal systems use UV-transmitting glass or quartz so the UV can exit the lamp envelope.
  • Ballast compatibility is critical: starting method and operating current depend on the fixture design; match OEM electrical requirements.
  • Thermal operating window: UV output depends on lamp wall temperature; fixture airflow and enclosure design influence performance.
  • Warm-up behavior: output stabilizes after start; many systems assume a warm-up period before validation measurements.
  • Output depreciation: UV output decreases with operating hours and surface fouling—manage by hours tracking, cleaning, and planned replacement.
Air, Water, and Surfaces: What Changes Between Applications
The same lamp can deliver very different results depending on the system geometry, distance to target, reflectors, airflow/water flow rate, and exposure time. For engineering and qualification work, focus on delivered dose at the target, not just lamp wattage.
  • Air systems: dose depends on mixing and residence time in the UV zone (duct treatment, enclosures, recirculating devices).
  • Water systems: UV transmittance (UVT), sleeve cleanliness, and reactor hydraulics drive delivered dose.
  • Surfaces: UV is line-of-sight; shadowing and soils reduce dose. UVGI is typically used to supplement validated cleaning/disinfection SOPs.
Replacement Guidance: How to Qualify a Substitute Correctly
  • Use the manufacturer code: retain 55197 in maintenance records whenever possible.
  • Match geometry: confirm G13 bi-pin, 436mm length, and 25.5mm diameter for fit and UV zone placement.
  • Match electrical requirements: confirm the ballast/driver supports the lamp’s operating conditions.
  • Confirm system requirement: if your application specifies ozone-free operation, sleeve materials, or interlocks, qualify accordingly at the system level.
Safety & Controls
Protect your eyes and skin when operating germicidal lamps. Equipment should be designed to completely screen or filter UV-C radiation, and many installations rely on shielding, interlocks, and controlled access procedures.
  • Never view an operating UV lamp directly outside of a rated enclosure.
  • Keep lamps clean: residue and dust can reduce output; handle with gloves and lint-free wipes.
  • Verify fixture integrity: after service, confirm guards/covers, gaskets, and interlocks are intact.
Cleanroom Considerations
  • Controlled changeout: treat lamp replacement as a minor maintenance event—minimize packaging debris and particulates.
  • Low-lint handling: stage clean nitrile gloves and cleanroom-appropriate lint-free wipes prior to service.
  • Program management: track operating hours and replace on schedule to maintain consistent performance.
Industry Update: ENI Business Transfer (Expected Close by End of March 2026)
Ushio announced an agreement to acquire ams OSRAM’s Entertainment & Industry Lamps business, with closing anticipated by the end of March 2026. To reduce risk during market transitions, qualify replacements by manufacturer code (55197), electrical specs (25W/46V), base type (G13 bi-pin), and critical dimensions (436mm length, 25.5mm diameter), and retain these identifiers in maintenance records.
Need deeper specs or fixture guidance?
If you need additional information please try our SOSCleanroom specific AI ChatBot which draws from our extensive cleanroom specific libraries.
For UVGI applications, confirm OEM fixture/ballast requirements, shielding/interlocks, and the required dose for your specific air, surface, or water use case prior to operation.