Types of germicidal lamps

All UV technologies have different capabilities and are consequently suited for different purposes.

Low- or medium-pressure UV lamps

Historically, the most common type of lamp used to produce UVC radiation, this lamp has its main (>90%) emission at 254 nm. These lamps are often referred to as mercury lamps. They are powerful but can only reach a limited level of disinfection. A major drawback is also that they contain mercury, which is hazardous to humans and the environment.

Far-UVC excimer lamps

Far-UVC excimer lamps emit narrow-band UVC with a peak emission at 207 or 222 nm. So far, few safety studies have been made, however, the results are promising and indicate that Far-UVC may allow for human exposure during a limited period of time.

Light-emitting diodes (LEDs)

Light-emitting diodes (LEDs) that are widely used for traditional lighting, are now also being adapted to produce UVC light. Typically, LEDs emit a very narrow wavelength band of radiation. Currently available UVC LEDs peak at between 265 and 280 nm. LEDs may generate heat, which has to be taken into consideration when designing a product. In some cases, additional cooling may be needed.


PureFize® is a new generation UV disinfection technology that builds on the principle of field emission in a nanostructured environment. It produces a broad spectrum of wavelengths, peaking when germs best absorb UV light and with relatively high power output. PureFize permanently inactivates germs and prevents regrowth.

If you have any questions or would like more information about UV technology in general or PureFize® in particular, please contact us.