Today in my homecenter I found 6 of these NOS Tungsram F58T8 tubes put neatly in a bunch twisted with wire near the appliance and discharge lamp recycling bin. At first, as I saw them in a distance next to the last checkout register, I momentarily went into a joy induced cardiac arrest because I thought they were T12, but upon closer inspection they turned out to be T8s. . . Now don't get me wrong, NOS Tungsramn T8s 5 footers made in early 2000s are still a pretty nice gem, but ya know, everyone likes more T12s rather than T8s. In total there were 4 Daylight F58T8 ones and 2 Cool white F58T8 ones.
These tubes are quet nice tubes. First of all, they are very bight. In the picture they look mercury starved, but all T8 tubes has this wavy arc in the middle when turned on, it goes away as the tube warms up. Also, one thing I noticed, the Cool white ones were not so much Cool whites, but the light resembled more Full daylight, like 5000k but with a slight tinge of lemon yellow in the undertone, more like 4800k witch I think is very cool, because I fell in love with this color. I compared this tube with a regular Tunsgram Cool white F36T8 and it looked much more yellow than F58T8 one, so my suspicions were correct - This tube has the special blend of phosphors that makes it very warm full daylight. You can even see in the pictures that it does not look like normal CW tube, it looks much more white, like Duro-test's vita-lite, but with a tinge of yellow. Let me know in the comments if you see it too.
Daylight ones I will post a picture because they are some generic pretty dim common daylight tubes that makes everything looks like its in hospital.