Well I'm not an expert but to me the two dens look a bit like hybrids of Dendrobium Phalenopsis. (This is not to be confused with the Genus of Phalenopsis.)
If I'm right then they need general care similar to the Genus of Phal but with brighter light and they DON'T need a winter rest. Take a look at the link I gave before for general care tips on Dendrobium.
For the Phals take a look at this care sheet.
Phalaenopsis - Orchid Board
Generally speeking they both want temps arround standard house temps. Both of them can be watered when the medium dries out. The Phals likes enough light but not direct light. I have mine in an east facing window and they seem to do well. The Dens like brighter light, I have mine in a west facing window.