I use one of these every day, found two things, one from Philips in 2011 with some PDF documents, making claims the light is safe: http://www.p4c.philips.com/cgi-bin/cpindex.pl?ctn=HF3332/60&...

2011 was a while ago, this Stack Exchange post from 2013 seems to indicate there is a possibility for macular degeneration with use of these devices, particularly if you are already at risk for the condition: https://skeptics.stackexchange.com/questions/13891/can-blue-...

Some googling seems to indicate there were rumors of these lights potentially causing issues, and it sounds like the Chemist article may be presenting a scientific basis for that speculation.

Turned off my light for now.