On Sun, 08 Jan 2012 21:03:56 +0000, Bramblestick wrote:

The device is in a really dark nook, getting no natural light, and for
at least the last 5 years the area is lit 24/7 by a lamp on a bureau -
some 18" away (Philips compact fluorescent for the last 3 years or so).

I think CFL's push out rather more than just visible light. Not high
levels of UV but enough over a long period of time to affect things

--
Cheers
Dave.