We don't have trouble with the strength of eight foot T8 lamps in the
US. Many eight foot lamps are made in 1 inch diameter.

Jeff Waymouth

Andy Wade wrote:
Andrew Gabriel wrote:

[UK]

Commercially, T12's haven't been used for a long time except for
special applications.


Except of course for the 8 ft. length (now 100 W), which are still
fairly common. I've always assumed this is for reasons of mechanical
robustness - an 8 ft. T8 tube would be just too fragile - is that right?