On Tue, 29 Nov 2005, Sawney Beane wrote:

The bayonet bulbs I've found in Japanese and American cars require
more force. If the glass were as thin as an A19's

...it is. Thinner, in some cases.

The subject interests me and I don't know where to find glass
thicknesses listed. The glass on an A19 seems more fragile than
the glass on taillight bulbs.

Surely. Because it's larger!