Different varieties of S13 Silvia headlights

[SileightyBakka]

Hi, I've noticed that there are at least four types of Silvia (P)S-13 headlights.
There are the dual projector+fog OO
III Silvia III OO
triple projector w fog OOo Silvia oOO
triple projector w driving light OOo silvia oOO
and non projector == Silvia ==

I went with the dual projectors on my Sileighty because I like the way they look, even though they seem to be the most common although alot of people do the non projectors.

Does anyone know what the differances were on the cars they came on? Like were projectors an option or did the headlights change from year to year? Or were the different lights part of different trim packages?
Thanks in advance for any help on the subject.

[Suislide]

the only thing i know FOR SURE is that the non-projectors (my personal favourite, and most commonly referred to as "square") were only available on the '89-'90 CA18DET-powered cars. i would assume that the duel-projectors would have come first after that, and later on progressed to the triple projectors...but i could be wrong.

[SileightyBakka]

Although the square lights came on all the "factory" Sileighties, but talking about
those is opening Pandora's box