Per your link: >The primary meta-analysis of indoor ALAN and breast cancer risk suggested an association, but it was not statistically significant. That said,

Per your link: >The primary meta-analysis of indoor ALAN and breast cancer risk suggested an association, but it was not statistically significant. That said, I'm actually sympathetic to the idea, and personally use incandescent lights. I just don't have any hard evidence to back it up (yet).