Wow, that is a huge improvement.I've been pleasantly surprised by the improvement made by the Twinstar 900 SP.
It's really changed the feel of the tank and the whole room in fact. It's somehow clearer, as I think I was getting some strange things happening with strobing with the old light.
Pictures taken with iPhone and have had no adjustments to the colour. It's not what I call accurate, but it should show the difference.
My DIY light
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Twinstar 5%
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10%
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30%
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50%
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100%
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I too am doubting about the Twinstar S series and to get 2 900SP for my tank.
I did not see the light in person, and read people saying it washes out the green colour due to too much red.
Your tank is gorgeous.