Yep I posted a pic of it already. It doesn't give away a date, though it looks old. I bought it thinking there were lifelines inside, as i saw the lifeline end caps though a hole in the box. the box was sealed but had been opened and retaped, though all the lamps are identical.
I'm guessing it was made shortly after the got rid on the Lifeline style etch (early-mid 80s?). Since the lamps are identical it seems unlikely they were from another case.
I have a Sears "Soft Brite" lamp with endcaps like these, only it's an F40T12. I lit it next to a warm white Mainlighter last night and they seem about the same color, slightly brighter for the Sears though...would it be a /WW or /WWX?
Yeah noways the old school halo warm white is becoming rare, though I admittedly say "good riddance"! I should try comparing that Sears lamp again sometime.