Originally Posted By: larry818
I use that light diffuser. The grid is like 1/2" squares, and the cats don't mind it at all. Mostly. I turned the litter box so the opening is towards the wall, so they have to walk across the diffuser to get there and out. It works quite well. It was also like $1.

Which light diffuser? I can't find one for anything close to $1, and the site that contains the image that Bruno posted at the start of the thread does not seem to be in the business of selling them (and they only seem to work with IE5? huh?).
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Matt