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Sankyo Denki G8T5 8W 12" UV Germicidal Lamp

Sankyo Denki G8T5 UV Bulb – 8W 12" Germicidal Lamp

$13.50
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SKU:
G8T5 EACH
Availability:
5 - 7 Business Days
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Calculated at Checkout
Product Description
Compact 254nm UV-C germicidal T5 lamp for enclosed air, water, and surface sanitation systems.
SOSCleanroom
Overview

The Sankyo Denki G8T5 is a compact 8W, 56V UV-C germicidal lamp designed for use in properly engineered UV fixtures and enclosed purification systems. It is specified for 254nm output—commonly used for microorganism inactivation in air and water treatment equipment and controlled surface-treatment applications. SKU: G8T5.

Key Highlights
  • Electrical: 8W, 56V
  • Spectral Output: 254nm (UV-C germicidal)
  • Base Type: Bi-Pin G5.3
  • Format: T5, 12" class compact germicidal lamp (fixture dependent)
  • Average Life: 8,000 hours
  • Case Quantity: 25 bulbs
Typical Applications
  • Enclosed air and surface purification systems
  • Water purification equipment (chemical-free treatment programs)
  • Food processing, medical facilities, pharmaceutical production, and clean rooms
  • Photochemistry and specialized equipment applications (system dependent)
  • Phototherapy and dermatology equipment where specified by the OEM
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 UV output.
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 (8W, 56V, G5.3 bi-pin, and 254nm) 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 (G5.3 bi-pin), and required UV wavelength (254nm) prior to installation.
The Technical Vault
By SOSCleanroom
UV-C Germicidal Science & System Design
254nm UV-C Compact T5 Dose (Fluence) Safety & Maintenance
Quick Specs
Product Sankyo Denki G8T5 | SKU: G8T5
Type / Format UV-C germicidal lamp | Compact T5 form factor | 12" class
Electrical 8W | 56V
Primary UV Output 254nm (UV-C germicidal)
Base Bi-Pin G5.3
Life / Pack 8,000 hours (avg.) | Case: 25 bulbs
The Science: How 254nm UV-C Inactivates Microbes
Germicidal UV (often called UVGI) reduces microbial contamination by disrupting DNA and/or RNA. When microorganisms absorb UV-C, photochemical damage prevents replication—meaning the organism cannot reproduce and is effectively inactivated.
254nm is widely used because it sits in a strong absorption region for nucleic acids and is efficiently produced by classic germicidal lamp technology. The practical driver of performance is dose (also called fluence): UV intensity at the target multiplied by exposure time.
Engineering: How a Compact Germicidal Lamp Operates
Germicidal lamps are typically low-pressure mercury discharge sources. The ballast/driver initiates an electrical discharge through mercury vapor, generating UV radiation with a strong line near 254nm. Unlike general-lighting fluorescents, the system is optimized for UV output and used with fixtures engineered for UV distribution and shielding.
  • Ballast matters: starting method and operating current are fixture/ballast dependent; match OEM electrical requirements.
  • Thermal operating window: UV output is sensitive to lamp wall temperature; enclosed systems are often designed to keep the lamp in its optimal range.
  • Warm-up behavior: output stabilizes after start; many applications assume a short warm-up before performance checks.
  • Output depreciation: UV output gradually decreases with operating hours and surface fouling—track hours and clean/replace on schedule.
Dose (Fluence): The System Variable That Controls Results
Germicidal performance is dose-driven. The same lamp can deliver very different outcomes depending on the fixture, distance to target, reflectors, airflow/water flow rate, and exposure time. In product qualification, focus on “delivered dose at the target,” not just lamp wattage.
  • Air systems: dose depends on mixing and residence time in the UV zone (common for compact enclosed purifiers).
  • Water systems: UV transmittance (UVT), sleeve cleanliness, and reactor hydraulics drive delivered dose.
  • Surfaces: UV is line-of-sight; shadows and soils reduce effective dose at the surface.
Where a G8T5 Class Lamp Fits Best
  • Compact enclosed purifiers: small cabinets and devices treating air and/or surfaces in a controlled chamber.
  • Point-of-use water treatment: compact UV reactors where lamp geometry matches the OEM design.
  • Specialty equipment: photochemistry, phototherapy, and dermatology equipment where the OEM specifies lamp type, base, and UV output.
Safety & Controls
Protect your eyes and skin when operating germicidal lamps. In OEM applications, equipment should be designed to completely screen or filter UV-C radiation. Good practice includes shielding, interlocks, controlled access, and procedures appropriate to the installation.
  • Never view an operating UV-C lamp directly outside of a rated enclosure.
  • Handle carefully: avoid fingerprints and residue; keep the lamp clean to help preserve UV output.
  • Fixture integrity: confirm that guards, covers, gaskets, and interlocks are intact after maintenance.
Cleanroom Considerations
  • Controlled changeout: treat lamp replacement as a small maintenance event—minimize packaging debris and particulates.
  • Low-lint handling: use clean nitrile gloves and lint-free wipes suitable for controlled environments.
  • Program management: track operating hours; replace and clean per SOP 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 industry transitions, qualify replacements by manufacturer code, electrical specs (8W/56V), base type (G5.3 bi-pin), and required wavelength (254nm), 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.