Hi David,
In Paintings Conservation at The Met, we are using Westcott Flex Cine Bi-Color Mats (1x2 foot). We have a pair of them mounted on a rolling stand, so this amounts to a 12 inch wide by 48 inch high array. They are dimmable and color temperature adjustable. We have been using them for more than six years and they have served us very well for raking light and all our tethered photography.
Best,
Evan Read
Manager of Technical Documentation
Paintings Conservation
The Metropolitan Museum of Art
New York, NY
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Evan Read
Manager of Technical Documentation
Metropolitan Museum of Art, The Cloisters
New York NY
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