I own an F10 and an E39. I haven't used any stripes for my F10 to enhance the interior light, as I never even thought about it. It always seems enough to me. One thing I heard from other owners is that basically what is happening is that the darker interiors are absorbing all of the light, and the lighter interiors are reflecting more of the light. But, if you still want to use LED stripes to enhance the lights, I can help you with that. I did it with my E39 as I wanted to add
interior car lights as well.