ok im haveing a hard time understanding lighting xD i have a 56 gallon that is 30" W x 18" D x 24" H i plan on adding java ferns,java moss,hair grass and some giant vallisneria (i think this i might pick a smaller type but i like grass look) but anyways can anyone show me a picture of link to what i need lighting wise? or explain it to me >< im haveing a hard time because im looking threw sites theres tons of different types of bulbs, n then theres led stuff too im so confused >< please help.