If you have a deep or tall tank, you may need stronger lights even for medium/low light plants because the light has to make it through more water to reach them.
_Lights:_There are dozens of small considerations to take into account when making your lighting decisions. Some plants can thrive in low-light. Others need more intense lights to even have a chance at surviving. If you have a deep or tall tank, you may need stronger lights even for medium/low light plants because the light has to make it through more water to reach them. If you have a long aquarium, you may need multiple small lights or a longer light with a greater reach/spread. If you don't have a lot of plants, too-intense lights combined with other imbalances can lead to an algae bloom.