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Straight clear glass tube with metal base and internal electrode structure

Ushio

Ushio 300304 9 W germicidal standard bulb 8000 h

SKU CH-KG8S-DCB33

A low-pressure mercury-arc germicidal bulb emitting UV-C at 253.7 nm with an 8000-hour rated life

  • TypeGermicidal Bulbs
  • Wattage9
  • Life Time Hours8000
  • Peak 253.7 nm UV-C output for effective disinfection
  • 8000-hour rated life reduces replacement frequency
  • Low mercury dose meets environmental demands
  • Special coating maintains high output over long life
  • High-purity construction limits depreciation to 20-25%

Ushio 300304 germicidal lamp for UV-C sterilisation

The Ushio 300304 is a 9 W low-pressure mercury-arc lamp that emits UV-C radiation peaking at 253.7 nm. It is designed for disinfection duties such as water treatment, air conditioning systems, pharmaceutical processing and laboratory research. The lamp carries an 8000 h rated life and a special coating that sustains high output over that period.

Check power supply and fixture compatibility

Verify that the ballast or driver in your existing equipment matches the 9 W rating and the electrical characteristics of a low-pressure mercury-arc lamp. Ensure the socket type and physical dimensions suit the host device, as the lamp must seat correctly to maintain the UV-C seal. Confirm that the installation environment can accommodate the required safety shielding for 253.7 nm radiation.

Fits disinfection chambers

The lamp slots into OEM sterilisation modules, clean-room air handlers and photochemistry reactors built for low-pressure mercury-arc sources. Its high-purity construction limits depreciation to an average 20-25 % at end of life, keeping UV output stable for the full 8000 h cycle. Low mercury content eases environmental compliance without sacrificing the germicidal flux the application demands.

Highlights

  • Peak 253.7 nm UV-C output for effective disinfection
  • 8000-hour rated life reduces replacement frequency
  • Low mercury dose meets environmental demands
  • Special coating maintains high output over long life
  • High-purity construction limits depreciation to 20-25%

Specifications

BrandUshio
TypeGermicidal Bulbs
Wattage9
Life Time Hours8000

Questions about this item

What comes with the Ushio 300304 germicidal bulb and do I need a separate ballast?

The box contains the 9 W low-pressure mercury-arc lamp itself. A compatible ballast or fixture rated for 9 W UV-C lamps is not included and must be purchased separately.

How do I decide between the 9 W version and other wattages for my disinfection system?

Choose the 9 W model when your reactor or fixture is designed for that specific power level and flow rate; higher-wattage lamps deliver more UV-C output but require matching ballasts and larger chambers.

What does the 253.7 nm peak wavelength mean for actual disinfection performance?

The 253.7 nm output matches the DNA absorption peak of most microorganisms, so the lamp delivers effective germicidal action for water, air and surface treatment when installed in a properly designed UV reactor.

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