Uvc produces small amounts of ozone which will kill the flavor and aroma. It doesn’t effect the plant much at low levels while growing (the plant is constantly producing terps and flavinoids while alive) but i would imagine after harvest exposure would be much different.due to the plants lack of production.also the uv spectrum is harsh and would degrade the quality of your cannabinoids.i thunk when cannabis is radiated to sterilize canabis it,it is done as quickly as possible and is done with a powerful uvc light.also i believe it is ground up first to expose all materials to the light. Btw welcome and tks for the post & i hope this helps 
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