Fluval 2.0 setup recommendation

I got a new 48" Fluval fresh and plant 2.0, and now I need some advice for the wifi setup.
This light is being used to replace a 2 lamp f32t8 (4 foot t8) where both lamps were being run at a 4x overdrive(yeah custom fixture wiring). What would you all recommend for a start point on light level?
I know that over the next few weeks I will have to tweak the ferts (the old t8's are well overdue for replacement) due to the better spectrum, as well as possibly the light settings(water testing and observation will dictate changes).

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