185nm UV Lamp for Ozone Disinfection 1

A 185nm UV Lamp generates ultraviolet energy at 185nm which is proven to effectively produce ozone, a natural deodorizer. A 185 nm UV light produces UV energy at wavelengths shorter than 220 nm, which decomposes oxygen (O2) to produce ozone (O3). UV germicidal lamps are designed to emit the most effective wavelength of UV radiation, measured in nanometers (nm). 185 nm lamps produce ozone, while 254 nm is an optimal wavelength to target the DNA of viruses, fungi, and bacteria.

185nm UV Lamp for Ozone Disinfection 2

Ultraviolet radiation is proven to penetrate the cells of harmful, disease-causing microorganisms and rearrange their genetic material, rendering the cell unable to replicate. These harmful germs, including protozoa and algae, cannot reproduce and are considered dead. UV germicidal lamps are proven to be highly effective in many surface, air, and water disinfection applications, with 185 nm ozone lamps providing many benefits.

Low Pressure and Medium Pressure Germicidal Lamps

The two main types of UV germicidal lamps are low-pressure and medium-pressure mercury discharge lamps. Some low-pressure germicidal lamps will look very similar to typical fluorescent lamps, although the glass tube does not contain a fluorescent phosphor. The glass is also made of either soda lime glass or fused quartz as opposed to an ordinary borosilicate glass in typical fluorescent lamps.

This allows the optimum wavelength produced by a Mercury arc of either 185nm or 254nm UV light to pass through unmodified. Low-pressure Mercury discharge lamps will still produce visible light due to Mercury radiation bands.

Medium-pressure Mercury discharge lamps look very similar to high-intensity discharge (HID) lamps and produce a broadband of UVC radiation rather than a single, narrow band line. These broadband UVC germicidal lamps produce a bright, bluish-white light and are common in many industrial water treatment applications due to their intense radiation source.

Low Pressure Amalgam UV Lamps

Low-pressure Amalgam UV lamps provide stable performance over a wide range of ambient temperature changes with 3 to 4 times higher power density. Amalgam lamps are preferred for long-term applications and are available with either spot or pellet Amalgam technology. Spot Amalgam technology uses Mercury Amalgam applied to the inner surface of the lamp, whereas pellet Amalgam technology has Mercury Amalgam on the outside of the lamp arc.

Amalgam lamps provide some benefits over other lamps with the vapor pressure controlled by location and composition of Amalgam and allow for higher lamp current operation with robust filaments.

185nm UV Lamp for Ozone Disinfection 5
Low Pressure Amalgam Lamps

Ozone Producing 185 nm UV Lamp Benefits

Ozone Air PurificationOzone Carries Through the Air

Ozone-producing 185 nm UV lamps offer additional benefits and are required to oxidize specific organic compounds. One major advantage of ozone disinfection lamps is that ozone carries through the air to places where UV radiation does not directly reach. Many UV air purification systems use 185 nm UV light to effectively disinfect and clean the air in HVAC systems.

Ozone Water Purification – Stronger than Chlorination

185 nm lamps are also very common in many water disinfection applications. Ozone is proven to be very effective over a wide range of pH environments and reacts quickly with viruses, bacteria, and protozoans. Ozone provides a very strong oxidizing power and a short reaction time, with stronger germicidal properties than chlorination in many applications. Ozone does not add harmful chemicals to the water and eliminates many protozoans that chlorine does not, such as Giardia and Cryptosporidium.

Ozone Oxidation Powerful Water Disinfection

It also provides excellent oxidation and disinfection properties, making it popular in drinking water treatment systems. 185 nm lamps are convenient because ozone can be added to water treatment systems at several points, such as during pre-oxidation, intermediate, and final disinfection treatment processes. Ozone water disinfection is used worldwide in many applications, including ballast water treatment systems for ships, which are globally enforced to protect the planet’s oceans.

185nm UV Lamps from LightSources

LightSources and LightTech offer 185nm UV lamps manufactured with high-quality quartz glass. The type of fused quartz used to make the envelope, or the bulb, of the germicidal lamp determines the wavelength of UV emissions. Ozone is an extremely effective deodorizer and active oxidizer that destroys microorganisms on contact. The LightSources Group offers Very High (VH) UV germicidal lamps, which produce UV energy at 185nm, as well as Low (L) lamps, which produce 254nm.

Our L lamps are designed with specially doped fused quartz to prohibit emission at 185 nm, while our VH lamps are designed with clear fused quartz to allow emission at 185 nm. These 185 nm UV lights are found in a wide range of air treatment systems and water disinfection applications. VH lamps effectively reduce total organic compounds (TOCs) and are commonly used in HVAC UV air purification systems.

LightSources and LightTech offer UV germicidal lamp solutions for any application, with a wide range of patented, high-tech lamp products and custom-designed solutions available. We design, engineer, and manufacture lamps with two types of quartz spliced together to produce specific amounts of ozone. Our ozone disinfection lamps provide many benefits including:

  • High-quality quartz glass construction
  • Effective deodorization and oxidation
  • Customized proprietary design options available
  • Effective in a wide range of air and water disinfection applications

Review UV lamp applications for OEM systems to see how ozone generation fits alongside liquid disinfection, air treatment, surface processes, and other UV functions.


The combined strengths of LightTech in Europe and LightSources in the United States allow the LightSources Group to support OEMs worldwide with vast resources and high-tech lamp solutions. By offering a wide selection of standard products and customized solutions, our clients maintain replacement sales within their OEM market for increased revenue and repeat business.


LAMP PRODUCT DATA:
UV Germicidal Lamps
LAMP Applications:
UV Germicidal Applications

The LightSources Group offers customized, proprietary lamps with unique advantages for the germicidal lamp industry. We are recognized for a commitment to all customers to exceptional service, research and development. Contact us for all your germicidal lamp needs including high performance 185nm UV lamp solutions.

Dan Spicer Avatar

Dan Spicer

Global Director of Sales

Dan Spicer has been working with Light Sources Inc. since 2013. He holds an A.S. degree in Laser and Fiberoptic Technology and an A.S. degree in Electronics Engineering Technology from Three Rivers Community College. In addition, he holds a B.S. degree in Physics from Southern Connecticut State University and an MBA with a focus on Global Marketing from The University of New Haven.

Dan has authored and co-authored papers that have been published in The National Institute of Standards and Technology Journal of Research, as well as the Journal of Water Process Engineering. He currently serves on the International Ultraviolet Association’s (IUVA) Board of Directors.

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