I am going to show you right here, a picture I took at my college....some of the older buildings have mostly T12s but some got upgraded or replaced with T8....
Most of the T8 lamps will NOT work on T12 rapid start fixtures...they just flicker like crazy....but we DO have rapid start ballast MADE for T8 but that is a separate story....
DOR123, I strongly suggest you not to guess what you think Amercians have, I don't really judge the Europe or other country lights, only what I hear from others!
I strongly suggest you to
ask the member TL8W whom I have met (as seen on the picture which I was there with TL8W who is from the UK or England which I forget, he has taken pictures of the lights and saw them when he was around NYC.
NYC has many various of lights in use...
Also for the picture I took, it shows three fixtures with T12 and one fixture that has T8, which is brighter?
Posted this pic
here