Our Surveyor SP 220 has the factory LED lights on the awning, but it is a Carefree of Colorado electric awning, not a Dometic. After just a few trips, we saw several of the individual lights blinking or going out altogether.
It was a warranty issue, and our dealer's service dept said it was a known issue. They said they were notified that the awning company had used a bad batch of the light strips and had sent new ones to the dealer's parts department.
We took it in and got the strip replaced, and no problems since. It really looks bad when a few of them are not burning, in our opinion.
2013 Surveyor SP220
2010 Silverado LT 5.3 V8
The world is a great book, of which those who never stir from home
read only a page. - St. Augustine