Java Fern and Crypts handle low light just fine, but they're also happy in medium light conditions. No issues there.
As for Jungle Vallis, I've gotta say, it's not the best choice for aquariums. Narrow Vallis or twisted Vallis do way better in tropical setups and don't need those high pH and GH levels that Jungle Vallis requires.
Pearlweed, I'm not familiar with that one, gotta look it up.