Additional pictures and info. (suggestion from EOA friend)
How much UP Z led we should use?
The following is a guide for planted aquarium:
OPTITANK tank size Use total watts
31x18x24cm UP LED-Z-10 10.7w
36x22x26cm UP LED-Z-12 10.7w
45x24x30cm UP LED-Z-15 16.0w
45x30x45cm UP LED-Z-15 (x2) 32.0w
30x30x30cm UP LED-Z-10 (x2) 21.4w
60x30x36cm UP LED-Z-20 (x2) 42.6w
60x45x45cm UP LED-Z-20 (x3) 63.9w
Example of ANS OptiCube 60x30x36cm using UP LED-Z-20 (2ft)
we hope this will clear some doubts you will have.