These homes have a notorious lighting bug for enchanted lights or lighting with strong ambient effects like varla stones. The lights just don't work until relogging in the home, which is obviously not possible for guests as they'll be kicked out to the open world upon logging out.
I've posted about this before, submitted a ticket, and found other threads that discuss it but still no ZOS response. I'd really like some kind of information on what we're supposed to do about the lighting bugs in these houses?