How old style light bulbs are made
 

Making a light bulb with a tungsten filament is a little
complicated. The filament starts out 20" long.

https://www.bing.com/videos/search?q=engineerguy+youtube&ru=%2fvideos%2fsearch %3fq%3dengineerguy%2byoutube%26qpvt%3dengineerguh% 2byoutube%26FORM%3dVDRE&view=detail&mid=B6F6044ECF A777D3CE41B6F6044ECFA777D3CE41&rvsmid=951D328C32BC 8F6F4DA4951D328C32BC8F6F4DA4&FORM=VDQVAP

Or https://preview.tinyurl.com/y374nsgv