The effective exposure distance mainly depends on the definition of "effective" and the performance of the light source used. Since each bacterium or virus has a lethal dose (see《Comparison table of commonly used ultraviolet radiation dose》）Therefore, the effectiveness of a certain distance depends on whether the ultraviolet radiation intensity of the distance reaches the lethal dose. That is to say:

(1) If the defined sterilization rate standard is low and the required lethal dose is small, the corresponding effective distance will be longer;

(2) If the pearlescent power is high, the irradiation intensity at the same distance is increased, and the equivalent effective irradiation distance can be further;

(3) Similarly, if the sterilization time is prolonged, the cumulative radiation dose will be higher, which can also kill bacteria and viruses farther away.

How to configure the self-service design tool《Rapid design tool for disinfection cabinet / box / package deep UV uvc-led scheme》。