Ok real world set up
120gl tank 60in long 25in deep.with two light strips twin Sq base bulbs in each strip.makes 120w output for each strip
For a total of 240w gives me my 2w per gl
Shining thru glass lids No firts No CO2
Thick mass of water sprit floating,2 Am swords on the bottom
Set up and running over 3 years.the water sprite will not grow on the bottom,I have to float it to grow it the swords grow Very slow and are nice green but pale.If I was going to upgrade the lights so I can grow more plants do to it's depth I'd go to 5 or6 watts to a gl.hope this helps
120gl tank 60in long 25in deep.with two light strips twin Sq base bulbs in each strip.makes 120w output for each strip
For a total of 240w gives me my 2w per gl
Shining thru glass lids No firts No CO2
Thick mass of water sprit floating,2 Am swords on the bottom
Set up and running over 3 years.the water sprite will not grow on the bottom,I have to float it to grow it the swords grow Very slow and are nice green but pale.If I was going to upgrade the lights so I can grow more plants do to it's depth I'd go to 5 or6 watts to a gl.hope this helps