I don't raw feed or show my two so can't help with either of those.
But re the light, can't you just take the bulb out when you're going to bed? Personally, I'm impressed with Yang learning how to do that
Peeing on the bed... Get a waterproof mattress cover whilst you try to work out what is going on with her so you don't have to keep replacing the mattress. It could be stress or her way of trying to mingle her scent with yours. Get a Feliway plug-in in the bedroom to see if that helps at all. I'm sure someone else will come along with more advice on your queries.