depending on the kind of plants you want to grow will determine the lighting you will want. if you go over 2wpg( like a 4x 65watt fixture) you will need presserized co2 to keep the algae down and ferts daily.
if you want a easy low tech tank i would stay around 200 watts. or less.
96 watt ah supply kit over a 125 tank would be a good start for a low light tank, plants like anubias, java ferns, crypts,vals, wisteria,hornwort,guppy grass are low light plants that would work with the 96w kit.
but if you want any medium light plants you will need more lighting and the co2 and ferts.
most people like to have alittle more than 1wpg so the plants will stay alive and actually grow.
if you want a easy low tech tank i would stay around 200 watts. or less.
96 watt ah supply kit over a 125 tank would be a good start for a low light tank, plants like anubias, java ferns, crypts,vals, wisteria,hornwort,guppy grass are low light plants that would work with the 96w kit.
but if you want any medium light plants you will need more lighting and the co2 and ferts.
most people like to have alittle more than 1wpg so the plants will stay alive and actually grow.