1880 – Edison continued to improved his lightbulb until it could last for
over 1200 hours using a bamboo-derived filament.
1903 – Willis Whitnew invented a filament that would not make the inside of
a lightbulb turn dark. It was a metal-coated carbon filament (a predecessor
to the tungsten filament).
The basic idea of the incandescent lightbulb is to have a filament (attatched
to an electrical contact) fully enclosed in an evacuated (a vacuum) glass envelope.
An electric current is passed through the electrical contact and in turn along
the filament which causes the filament to heat up, and eventually to a high
enough temperature to give of usuable light. However changing the type of filament
and and introduction of inert gases were the major changes in the design, from
it’s inital commercial success.
I keep seeing bloggers promising light blogging but they never
keep their promises. So I have filled the gap by doing some actual light blogging.
Even Catholic Light which
you would expect to cover Catholic Lighting never does.