yes, but in the sunburn context you could say that the UV rays produces a high enough level to cause cell death. So that the non-dead ones are undamaged. They don’t have to do much, just hang around long enough to hold the skin together, so that new skin can grow properly…
The cells probably can’t reduce the levels, they just die with a medium level, and so it will take days for significant replacement of the skin cells to say that the sun’s effects have gone.
So if you get a slight burn, you will burn quickly the next day, as many of the cells that could die from UV would still be high in the toxins that will kill it.
In terms of damage, such as DNA , skin cancer, collagen and wrinkles, perhaps different. this is only about the literal sunburn not the long term consequences. However, the same free radical attack that kills cells may also prevent DNA repair in those medium poisoned cells. For some reason, sunburn wipes out collagen… perhaps the fast growing replacement skin … needed to repair a sunburn… doesn’t have time to produce as much collagen, and then its collagen reduced for ever after.