To add, to my previous question, here are some costs;
The 8 bar t5 fixture, new bulbs, hydro basin, and wood for the stand bring the cost to 456.63.
The 4 bar t5 fixture, new bulbs, hydro basin, and wood for the stand bring the cost to 282.67
The 4 bar retrofit, bulbs, hydro basin, and wood for the stand bring the cost to 540.93
And the Kessil a160, hydro basin, and wood for the stand bring the cost to 317.72
So the T5 fixture 4 bar, remains the cheapest of all options. The prices above do not include the powerhead I will need to get, the egg crate, and any unforeseen costs. The prices also reflect plumbing the frag system directly to the sump. So naturally I'm still leaning towards the T5 4 bar fixture as that leaves the most wiggle room for those unforeseen costs. Why should I choose the T5 retrofit when it is the most expensive option on the table?