These dendrobiums enjoy full morning sun, but will require shading between 11am and 3pm – less shading will be needed in late afternoon. An overhead light source is most effective.
Phalaenopsis-type dendrobiums grow best when their potting medium becomes dry between waterings. They are epiphytes in Nature, (i.e. – they grow on trees) and are accustomed to becoming fairly dry between the rains of their natural habitat.