Hello from Malaysia. The Grammatophyllum speciosum is a native of my country, where it is hot and wet the whole year round; temperatures between 30 and 40C and rain about 100 inches a year. The Grammotophyllum speciosum is known as the Tiger Orchid here as the blooms are yellow with dark brown bars like the markings of a tiger. In cultivation they bloom at a height of 5-6 feet with with thick flower stalk from 4 - 10 feet tall bearing between 30 t0 50 5-inch flowers. They can be grown in full sun but blooming is very sporadic. I gave mine away because it never bloomed in the 10 years I had it.
The dendrobium is a nobile type but I'm afraid I can't give you the specific name of the one you have.