I usually use the search before asking a question. I know this question has probably been asked and answered before, but I cant quite find what Im looking for with the search. Please let me know the quick differences of these: include lighting, placement, ease of care, ect. maxima crocea derasa Also, what would an "average" price be for say a 2" clam of these different types. Basically which is the most expensive to least expensive considering all things equal. Thanks.