I have been RVing for 20 years, for the last 10 I have been full-time. Currently I have Camping with full hookups For the past several months. My batteries are getting a little old, I have two 12 V batteries. Once or twice over the past month my 12 volt lights have flickered much as described by the original poster, Except the flickering only occurs for a few seconds every few weeks.
Since I'm connected to a stable shore power I am surprised if the battery is the problem but the 1st warm day that will be my Task to check out the batteries.
