It's the fact that your plants are multiflorals that means more light is needed. There are many Paph. species and hybrids (not multiflorals) that will likely do well in your conditions. Maudiae-type plants are easy to grow and bloom, for example. Paph. fairrieanum is a species that is one of my personal favorites and is fairly easy to bloom and grow. You might want to do some research and see which ones push your buttons .