The BBC screened a fascinating programme in the Imagine.... series presented by Alan Yentob last night. Yentob explored the relationship between artists and light and met artists who use light as their inspiration or medium, including the American artist James Turrell, who I had not previously been familiar with. For the next 7 (now 6) days, this programme is available to view over the net here at BBC iplayer (I hope the link works). IMHO it is well worth a look as some of the light effects were fascinating and he also gives a glimpse into Turner's watercolour sketches.
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While I have been Googling for James Turrell I have found that there is one of his Skyspaces in the UK at the Yorkshire Sculpture Park ! I have never been to the Yorkshire Sculpture Park but it looks as though it will have to go on my list of places to go very soon. I knew of it, of course, but it had drifted to the back of my consciousness.