Hi Jenny
She looks like a very healthy plant, which is always a good start
. I have a delanatii x chamberlainium which i got this summer from Italy. I assumed that in a green house there, even if part shaded, it would have had very good light, so I placed it near an East facing window, only shading it on very warm days. It is now in the window except at night, and it stands on a pebble tray which is kept moist. The temperature range is roughly 16 - 25, which I know is a little warm, but I don't have air cooling so it has to cope! I water once a week to ten days, using rain water (when available) or tap water, which has come to room temperature, and I feed with a proprietary orchid feed 3 waterings out of 4.
I must be doing something right as it has now flowered! Since this picture was taken, a second bud has also opened.
I hope this will help you, I don't know your particular hybrid, but this is what has worked for me.