Germicidal ultraviolet light inactivates microorganisms by disrupting their cellular membranes and by damaging their DNA or RNA.
UV light will kill any DNA-based microorganism given enough UV dosage.
Safety of Upper-Room Ultraviolet Germicidal Air Disinfection for Room Occupants
UV abbreviations and definitions - the most common UV terminology used in association with UV and germicidal UV technology systems
The effectiveness of any UV application depends on delivering a sufficient UV dose to inactivate the target microorganisms.In air and surface disinfection the UV dose is calculated as follows:
UV dose* = UV intensity x Exposure time
An applications engineer knows how to take under consideration all the variables which affect the UV dose.
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* The UV dose is usually expressed in microwatt-seconds per square centimeter (µWs/cm²) or milli-Joules per square centimeter (mJ/cm²).