Join Date: Jan 2008
The amount of light is dependent on what you want to do with the aquarium (in terms of maintenance and also in terms of what plants you want to grow).
More demanding plants will require higher light, while less demanding plants can grow in lower light conditions.
The more light you have, the harder you will drive the plants to grow, so you will need to make sure your CO2 levels are stable and that you are fertilizing.
Lower light tanks are more forgivable.