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Clear tubular T5 germicidal bulb with four-pin base

Antique Light Bulb Co.

Antique Light Bulb Co. G20T5L 20W T5 4-Pin Germicidal Bulb 55031

SKU CH-57DB-XM9EX

A 20 W T5 germicidal lamp emitting UV-C at 254 nm with a 4-pin base and 9000-hour rated life

  • TypeGermicidal Bulbs
  • Wattage20
  • Life Time Hours9000
  • 20 W germicidal output for powerful UV-C sterilisation
  • 254 nm wavelength targets DNA of microorganisms effectively
  • 9,000-hour rated life reduces replacement frequency
  • 4-pin T5 base fits compatible fixtures directly
  • Ozone-suppressing outer glass enables safer indoor use

What This Germicidal Bulb Does

The Antique Light Bulb Co. G20T5L is a 20-watt T5 fluorescent tube that emits UV-C light at 254 nanometres for germicidal sterilisation. It carries part number 55031 and fits fixtures that accept a 4-pin base. The lamp is rated for 9000 hours of service life.

Installing The 4-Pin T5 Lamp

Align the four pins with the socket and press firmly until the lamp seats; no tools are required. The special outer glass tube absorbs lower wavelengths to suppress ozone formation, so handle the bulb by its ends to avoid contaminating the quartz surface.

Limits Of UV-C Sterilisation

UV-C output at 254 nm diminishes gradually over the rated life, so germicidal effectiveness drops before the lamp fails completely. The bulb produces no visible light for general illumination and must operate inside a shielded fixture to prevent direct exposure to skin or eyes.

Highlights

  • 20 W germicidal output for powerful UV-C sterilisation
  • 254 nm wavelength targets DNA of microorganisms effectively
  • 9,000-hour rated life reduces replacement frequency
  • 4-pin T5 base fits compatible fixtures directly
  • Ozone-suppressing outer glass enables safer indoor use

Specifications

BrandBulbamerica
TypeGermicidal Bulbs
Wattage20
Life Time Hours9000

Questions about this item

How do I verify the G20T5L 20W T5 4-Pin Germicidal Bulb is emitting UV-C at 254nm after installation?

Use a calibrated UV-C radiometer set to 254nm to measure irradiance output; the lamp should reach full intensity within a few minutes of warm-up.

What comes in the box with the 55031 germicidal bulb and what must be purchased separately?

The package contains the 20W T5 4-pin UV-C lamp only; a compatible 4-pin electronic ballast and fixture rated for germicidal use are required separately.

Which version of the Bulbamerica 20W T5 4-pin germicidal lamp should I choose for a 9000-hour rated life?

The G20T5L/4PSE model (part 55031) is the single 20W T5 4-pin version offered and carries the 9000-hour rated life specification.

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