Subject: What happens to the uv light energy absorbed by suntan lotions?

I am aware that some suntan lotions contain chemicals which 
absorb uv light energy.  Presumably this affects the 
configuration of the chemical in some way and I was wondering 
whether the energy is re-emitted from the chemical while still 
in/on your skin or whether the lotion containing the energised 
chemicals is just washed off the skin under normal circumstances.

Re: What happens to the uv light energy absorbed by suntan lotions?