LARGE ROOM AVAilABLE

I like this Park Slope, Brooklyn posting found in Key Foods on 7th Ave. because the author uses an interesting combination of upper and lowercase L's, and lowercase i's. The logic behind the lettering style is clear: uppercase L for the first letter of a word, (e.g. LARGE, with exception of lOTS), lowercase L for succeeding letters in a word, (e.g. SlOPE, FEMAlE), and the stylish twist of using only lowercase i's (LiBRARY, AVAilABLE). There is some method to the madness here, since the lowercase i negates any confusion that could have resulted by mixing uppercase i with lowercase L. But why use lowercase L in the first place? I suppose someone could call the author and ask ...