Stans in general are not demanding in terms of medium. You can use the same (good!) medium for all Stans with no problems. But they are demanding in terms of humidity and watering! Unfortunately, Stan wardii (together with lietzei) are amongst the more demanding, 'cause both need a relatively dry winter period. I think you will handle this very well. Dend light is OK for a great number of Stans (for lietzei, a little bit more is better).