Wow it's been a loooooooooong time since I late heard anyone mention the Fred Lite. It was used in the Ibanez FGM 300 in the neck position with a "Paf Pro Lite" in the bridge position. I think it was described as a Fred and a Paf Pro with less string pull from a decrease in the magnetic field (ref: 1994 Ibanez Catalog), so it's probably just the Fred and the PAF Pro with the air bucker technology before they started using the "Airbucker" terminology. I don't think these ever became actual models outside of being models for the FGM300.
I remember seeing somewhere that Dimarzio has stated that the "Norton Lite" on the original Ibanez JPM100 was actually the Air Norton before it was released, if the Fred lite and the Paf Pro lite were to be released, it'd likely be called the Air Fred and Air Paf Pro.
