In article ,
harry writes:
Carbon filiment??????? I thought THEY went out 90-100 years ago?

They came back as horribly inefficient decorative lamps a few years
ago (were available in B&Q, and may still be).

They've always been available for laboratory use from lab suppliers,
normally for imaging their filaments through optics (e.g. pin-hole
cameras).

They have an interesting failure mode - if the glass cracks and air
gets in, they normally explode at next switch-on.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]