This will be my first post, but I've been lurking for the past year...We have owned a 2015 White 2201 DS Minnie with the same lights as yours since March. I carefully pulled down the lense section where the lip meets the section attached to the ceiling. It came off with a little effort and did not break. You will be happy to find a strip of LED lights inside.
I was blessed to have camped with my folks and brothers as a youngster. Dad was a WWII vet - 10th Mountain Div. We had a tent, a Tartan Popup (with Mustang tail lights!) and a 22' 66 Holiday Rambler Travel Trailer that we went all over in. When my husband and I were first married, we camped in a van and tent, had 83 and 96 Coleman popups as our family grew to include 4 children. We downsized from a 2002 Wilderness to our Minnie. The Minnie is the best constructed
trailer we have owned.