edgefu: Indeed, they've called them the Light Warriors in a few different games, but usually not so directly and repeatedly as in I and XIV.

-The Onion Knights in FFIII are Warriors of Light, and they actually encounter the Warriors of Darkness in the Sylx Tower at the end of the game. There are Dark Crystals for each of them, too.
-There are 4 Crystals of Light and 4 of Dark on the Blue Planet in FFIV - the dark ones are underground, then there is another set of 8 on the Moon. Don't forget the extra one Golbez gives to Cecil, and the one you can steal from Zeromus, too!
-FFV had two sets of Warriors of Light in World 1 and World 2.. but this is getting out of hand

Getting the CROWN from those WIZARDs was another painful part of FFI. I'd usually just run into the Marsh Cave, engage that fight, and reset if there were more than 2 of them. 2-4 could appear if I recall.

XXXX and BANE, all of that, very nasty spells.