Low-Pressure Amalgam UVC Lamps
Noblelight amalgam UVC lamps utilize advanced long-life technology, ensuring reliable and consistent disinfection throughout their operating lifespan. These lamps deliver up to ten times the UV power density of traditional low-pressure mercury lamps and can operate effectively in high ambient temperatures, reaching up to 90°C. Additionally, amalgam lamps are resistant to temperature fluctuations, which improves their performance and durability.
Our unique Noblelight Longlife Technology coating prevents the discoloration and transmission loss typically seen with conventional UV lamps. This ensures that UVC output remains consistently high. While uncoated UV lamps experience a reduction to 50% of their UVC output after 8,000 hours of operation, amalgam lamps with the Longlife Technology coating maintain up to 90% of their UVC output even after 16,000 hours.
As a result, these lamps provide nearly constant disinfection capability throughout their lifespan, leading to significant savings in energy, maintenance, and replacement parts costs.
Lamps contain mercury. Manage in accordance with local, state or federal disposal laws.
| Ozone-free | Ozone-generating | |
| Spectrum: Wavelength | 254 nm | 185 nm, 254 nm |
| Arc length | 25 – 150 cm | 25 – 150 cm |
| Electrical power | 50 – 800 W | 50 – 800 W |
| Typical UV efficiency at 254 nm | 35% | 35% |
| Typical efficiency at 185 nm, natural quartz glass | - | approx. 6% |
| Typical efficiency at 185 nm, synthetic quartz glass | - | approx. 9% |
| Specific UVC flux | 0.5 –2 W/cm | 0.5 –2 W/cm |
| Service life | 16,000 h | 15,000 h |
- Operates at high ambient temperatures of up to 90°C
- Resistant to temperature fluctuations
- Energy-efficient
- Low-cost alternative to medium-pressure lamps
- Highest power density for low-pressure lamps
- Produces minimal heat
- Disinfection of water - municipal drinking water, sewage treatment plants and air-conditioning
- Reduction of pollutants in industrial exhaust air
- Decomposition/reduction of air pollutants
- Grease and odor control for food service kitchens
| Ozone-free | Ozone-generating | |
| Spectrum: Wavelength | 254 nm | 185 nm, 254 nm |
| Arc length | 25 – 150 cm | 25 – 150 cm |
| Electrical power | 50 – 800 W | 50 – 800 W |
| Typical UV efficiency at 254 nm | 35% | 35% |
| Typical efficiency at 185 nm, natural quartz glass | - | approx. 6% |
| Typical efficiency at 185 nm, synthetic quartz glass | - | approx. 9% |
| Specific UVC flux | 0.5 –2 W/cm | 0.5 –2 W/cm |
| Service life | 16,000 h | 15,000 h |
- Operates at high ambient temperatures of up to 90°C
- Resistant to temperature fluctuations
- Energy-efficient
- Low-cost alternative to medium-pressure lamps
- Highest power density for low-pressure lamps
- Produces minimal heat
- Disinfection of water - municipal drinking water, sewage treatment plants and air-conditioning
- Reduction of pollutants in industrial exhaust air
- Decomposition/reduction of air pollutants
- Grease and odor control for food service kitchens
Additional Resources
You can source low-pressure amalgam UVC lamps directly from Excelitas or through our global network of authorized distributors. When you connect with our team, we’ll help you define the correct lamp specifications for your system, whether you’re upgrading existing equipment or developing a new design.
While both lamp types emit germicidal radiation at 254 nm, amalgam UVC lamps deliver significantly higher power density and longer service life. Instead of free mercury, they use a mercury-metal amalgam that stabilizes vapor pressure, maintaining consistent output even at ambient temperatures up to 90 °C.
Excelitas’s proprietary Longlife Technology helps preserve as much as 90% of UVC intensity after 16,000 hours of use, making it an efficient choice for continuous operation.
These lamps are designed for high-demand disinfection and oxidation processes across various manufacturing and environmental systems. Typical applications include:
- Water and wastewater treatment, where the lamps inactivate bacteria, viruses, and other pathogens without the use of chemical additives.
- Air purification in HVAC and ventilation systems that helps neutralize airborne microorganisms to improve indoor air quality.
- Odor and grease reduction in commercial kitchens and food production exhaust systems.
- VOC and pollutant breakdown in industrial exhaust air, supporting compliance with environmental regulations.
- Surface disinfection for cleanroom, pharmaceutical, and semiconductor manufacturing environments that require sterile processing conditions.
Yes. Excelitas designs its lamps for compatibility with a wide range of disinfection and oxidation equipment. They can be retrofitted into existing reactors or integrated into newly engineered OEM systems without major redesign.
Our engineers collaborate closely with equipment manufacturers to refine lamp geometry, electrical interfaces, and power ratings, ensuring that every system delivers reliable and consistent UVC performance.
Keeping the lamps performing at their best requires only simple, routine care. Regularly clean the quartz sleeves to prevent deposits from reducing light transmission, and maintain operation within the specified temperature range. Using compatible electronic ballasts and following the recommended replacement schedule will help maintain a consistent UVC output over time.
Excelitas provides detailed maintenance and inspection guidelines to support dependable system operation.
Excelitas supports customers throughout every stage of their project. Our global team provides engineering consultation, installation assistance, and access to product performance data.
Customers can also download datasheets and technical references through our online resource library. With responsive regional service teams, you’ll always have expert help when you need it.