Teardrops n Tiny Travel Trailers

Stopped by Walmart today to look at the 12" florescents seen here by a member, and after not finding bulbs for them which worried me, (although I am sure you can get them) I happened upon the MR16 bulb. I couldn't help but wonder how they would work for interior lighting, They are already 12v, and if you get LED they would be cool running.

Anyone do this yet?

Looks viable but a bit directional. An alternative might be to find fixtures that use a G4 base and find LED's to fit. There are so many possibilities.