Most varieties prefer bright light and warmth as well as a reasonable degree of humidity. For most household conditions, pots are best because they hold more moisture around the roots. Teak baskets are really best suited for high humidity areas such as greenhouses, or growing chambers or outdoors where they could be wetted or misted every day. Plants in pots should be watered just as they medium dries out, approximately every 5-7 days for larger clay pots.
Most vandas are treetops on ridges along rivers and prefer bright light.
In terms of indoor culture, they require a south window. If growing under lights, high pressure sodium fixtures provide adequate light to promote flowering 2 to 3 times per year. Vandas can be grown outside in the summer as long as the night temperatures are in the upper 50 s or above. Grow under dappled sunlight such as a shade tree or an evergreen. Gradually they can be exposed to brighter light.