Heading out of Rome's center on Tram 8 towards Casaletto and just before the Ospedale San Camillo, take a look to your right for the lamp store.
La Luce, on Circonvallazione Gianicolense, may have the best sign in Italy. And I really can't enough of it. I'd like to say its because of my penchant for visual illusions and ambiguous drawings like the old lady/young woman. Didn't everyone in fourth grade? But the truth is I love anything kitsch.
The Professor doesn't fully understand my obsession but was kind enough to take this photo.