Interior lights are really easy to change....
If you are going for a different color inside, other then "white", I'd suggest rather then buying a whole bunch of colored bulbs, to simply buy a sheet of "gel".
Now they call it "gel" but it'* more like really really super thin plastic. It'* the type of thing they use to color strobe lights and such, and it can handle really high temps.
I bought a 1x1yard of it for $6 bucks (Cdn).
More then enough to do 5 Bonnevilles.
BTW.... my inside lighting is all red.