DIYbanter - View Single Post

wrote:
Hamie wrote:

wrote:

Both types of lamp contain toxic metal. Filaments contain thorium

Tungsten. Thorium is a radioactive metal. Not used in bulb filaments
AFAIK. Google for halogen lamp. You'll get quite a few hits from
manufacturers.

Filaments are not pure tungsten, thats the problem. Its to do with
workability.

Granted.. But I don't think the additives are thorium...