Actually, Lite White is 3900K 49CRI. But still a cool find for sure! I don't think full-wattage F40T12 Lite Whites were ever made, but Philips did make a F40T10 40w Lite White back in the day.
The purpose of the Lite White, in case you don't already know, or someone else reading this doesn't, is this: With the old-school halophosphate lamps, the lower the CRI (Color Rendering Index), the higher the LPW. (Lumens Per Watt). Since the 34w energy savers are dimmer than a standard F40CW would be, the Lite White was an attempt to make the 34w energy savers as bright as a F40CW, albeit at the expense of color rendering. (Lite White is 49CRI, standard halophosphate cool white is 60 or 62 CRI, depending where you look.
Sylvania/GTE also made a "Lite White Deluxe" lamp. I THINK it was supposed to have better CRI, but don't quote me on this. I've never seen one in person. As far as that goes, I've only seen Lite White in person once, years ago. You'll hear different descriptions from people here on Lighting Gallery about how it looks in terms of color. From what I remember it was slightly greenish. But there was nothing else to compare it to. People have done comparison photos before. If I ever get myself some Lite Whites I'll post some comparisons too, between them and a F40CW, or between them and a standard 34w cool white.