Mauro, you've just received a whole lot of the very best info you're going to get, and it's just up to you to decide what you're going to do, to achieve what you want.
All I have to say is that the original pic of your tank looked absolutely superb to me - too bad your discus seem to feel it's too bright for them ! lol
Always nice to see/read your posts.
Thank you, folks. When I get some extra time I will try the window tint, possibly in the acrylic lens of my lighting fixture.
Hi Paul, nice to know that you like my tank's latest setup. The lighting of the single T5HO 54w lamp looks fine to me, but it seems too much for my wilds. They come out more frequently and become much more active when the lights are off. I just hope I can make them more comfortable.