DIYbanter - View Single Post

wrote:
nightjar wrote:

wrote in message
groups.com...

Incandescents are widely maligned for making much more light than heat;
but if I'm correct, in a centrally heated home that extra heat produced
by incandescents would be recycled, by helping heat the home (and
reducing heating oil bills slightly)?

Where incandescent lamps do score is that, unlike low energy lamps and
fluorescent tubes, they are not classed as hazardous waste and do not need
specialist disposal facilities.

Colin Bignell

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.

(iirc), flouros contain mercury. Modern fls use a tiny fraction of the
amount of mercury used in older tubes, some old tubes can be a genuine
toxicity issue.

Yeah. I remember at school when one got smashed we all had to leave &
they had to get someone in to clean it up...

H