I have a Boyu 32 inchx16 inch x 18 inch tank. I have few Anubias along with my Gouramis, clown Loaches, Swordtail and rainbows.
I have 2x12w Corvi LED Tube, 1800 lumens each (total 3600lm).
I switch it on for 4 hrs at a time twice a day, 7:30 AM to 11:30AM and 6:30 PM to 10:30 PM.
For the time that the light is off and for night time, I would like to add another low brightness light.
Should I add a purple or blue tube? Or another low wattage tube?
What's your suggestions?

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