i've been keeping planted tanks for several years, so i do know about high light plants. crypts are definitely low light guys. crypts, anubias, java ferns, hydrocotyle, they will all grow well under low lighting conditions. in fact, i keep a bunch of crypts, some hydrocotyle and some anubias in my mantella tank. some grow emersed, some grow semi emersed and some are growing aquatically.