Hey all. I'm looking at yet another tank setup and I'm doing some pre-setup research. The tank will be 18x12x12, sand substrate, probably TPN+ ferts and probably Excel dosing. Planting will be mainly vallis sp., eleocharis sp. and some stems, such as Bacopa Monnieri and other delicate stems. Maybe even some Hydrocotyl sp. Anyway. Based on this rough planting list and the size of the tank, can anyone recommend what lighting level I should be aiming for?