They realy like allot of airflow and high humidity, and fairly bright light.
The first time I bloomed it, it was indoors before my humidity epiphany.
The blooms opened but they just hung down limp like hound dog ears.
Also I use oyter shell in the potting mix, and treat it like it was calciolous. It may just be this particular plant since it seems like lowii are usually found in trees, and should prefer a more acidic mix. Andy thought this plant (or parents) originated from Borneo stock, and there is some documentation that lowii there will be found on limestone (on the same cliffs as sanderianum) as well as in trees. With this species it may be worth trying some different strategies with individual plants until you find what works best.
Rick, can you take a picture of the whole plant? I don't understand how the placement of the blooms. Are all they all facing up or is the plant mounted? Then, how does the spike stick so horizontally straight out?