@lynne@pars.ee
Somewhat relevant
https://www.whatonearthcatalog.com/cgi-bin/hazel.cgi?ACTION=DETAIL&ITEM=CY7366
https://www.etsy.com/listing/648564924/e26-colored-edison-light-bulbs-filament?gpla=1&gao=1&
https://www.etsy.com/listing/711044303/vintage-spectral-tube-lamp-with-neon?gpla=1&gao=1&
https://www.instructables.com/Homemade-Lightbulb/
www.dpreview.com/forums/thread/3969659