Not that I know of, though people believe all sorts of things. The
light can be unpleasant, but nowadays there are full spectrum types
with more pleasing light quality. It's that beautiful ole sunshine
that is the cancer risk- though mostly if you get sunburned, excessive
exposure- they're now finding that some exposure is good for you,
produces Vitamin D3, which strengthens your bones, and seems to prevent
cancers. It's just like the older generations told us, sunshine and
fresh air...and everything in moderation.