Originally Posted by aemaki09
You are going I want atleast 2watts per gallon.
JKADLJFKLSJADSF no. There is no need. Unless we all use the same bulbs, light fixtures/reflectors and same height from the substrate... that rule doesn't work, at all. I have a 2 bulb total for 48 watts T5 fixture, which outputs like 3x as much light as a T8 that has 24 watts, but I have it hanging so it isn't get all that light... A single T5 fixture that fits in the hood that is 6500k will be fine for most plants (low light), but is great for beginners. Way less to worry about.
Ludwigia, rotala, wisteria, anacharis, dwarf sag, dwarf pygmy chain sword, crypts, anubias, hygrophila corymbosa will all be fine in the T8 lighting. Just make sure that if you do get ludwigia or rotala that it is under the light.