Without a picture it is hard to tell what type of den you have. What I usually do is google dendrobium orchids and look at the images until you find one that looks like yours. I have identified several of mine this way. Once you find the type just google the cultural requirements. Dens do like a lot of light. I live in Florida so my dens spend most of the year outside. In summer they have a very course shade cover over them but at this time of year they enjoy full sun.