I have this effect on my IT2040 as well. It's only really pronounced closer to the surface. The "3D glasses effect" is a great way to describe it  . The IT2040 has only 2 red and 2 green which seems more than enough. As a quick test I stuck on pieces of masking tape on the splash shield under those leds and it solves the issue but looks tacky and the coral colours looked a bit less vibrant. I'm going to try to remove the 90 degree optics from all the red/green to see if it blends better. Have you tried that yet?
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20 year old Hagen 100g 6' mixed reef. 36g sump with multiple broken Waveline products removed. Lights T5-LED combo.
1 Coral Beauty, 1 Flame, 1 Blue Tang, 5 Green Chromis, 2 Pajama Cardinals, Asst'd hermits & snails.
2 large boxes of broken expensive aquarium crap. 1 x VERY understanding wife.
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