Exposure time exponentially reduced by decreasing irradiation distance.
In a report from April 2020, UV-C LED manufacturer NICHIA demonstrated the effectiveness of UV-C LEDs against several bacteria cultures. In the report it was confirmed that UV-C exposure time can be exponentially reduced by decreasing the irradiation distance between the virus and the UV-C source.
The graph below demonstrates the distance to effectiveness.
The AIR device sanitizes air within 3mm irradiance which shows the most efficacy against bacterium according to the graph above.
All bacterium tested shows similar results, the closer to the source the more effective the UV-C germicidal function was.
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