home *** CD-ROM | disk | FTP | other *** search
- THE WEEK, Page 22HEALTH & SCIENCEBeware Halogen Bulbs
-
-
- High-tech lighting may be as bad as sunlight for causing skin
- cancer
-
-
- As the ozone layer thins, people may spend more time indoors
- to avoid the skin cancers and cataracts likely to result from
- more ultraviolet light reaching the earth's surface. That
- strategy could backfire. Like the sun, the high-intensity quartz-
- halogen lights used increasingly in homes and offices emit
- ultraviolet as well as visible light, and there is now evidence
- that they, too, can cause skin cancer.
-
- Two scientists at the University of Genoa, Italy, noted
- that the rays coming from unshielded quartz-halogen lamps can
- induce mutations in the DNA of bacteria. Since genetic mutations
- are one cause of cancer, they decided to move up a few rungs on
- the evolutionary ladder. They subjected specially bred hairless
- mice to the lights 12 hours a day for a year and found that
- every one developed skin tumors -- most benign, but some
- cancerous. The research, reported in the British journal Nature,
- involved only a handful of mice, so it was labeled a pilot
- study. But the results were so striking that the authors
- recommended installing UV filters on halogen lamps already in
- use and requiring that all new ones come equipped with such
- filters (some already are).
-
-
-
-
-
-
-