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I know it isn't his installation, he's an electronic geek, our go to guy for some of us on this forum for all things electronics on our layouts.
Roger,
I wasn't thinking of an electronic issue (electrical installation of LED strips seems pretty straighforward), but rather that the spatial context of his LEDs was somehow unusual. Otherwise, you would think that this would be a common complaint. For example, I would guess that reflections from a point light source would vary significantly, based on its position relative to the track and to the viewer.
I'm hoping I don't see this with my future installation, as I would expect any sort of diffuser to cut down on light intensity. Mine will all be positioned behind the upper valence, and thus will all be in front of the track; hopefully this will eliminate the problem.
MH