Nice purchase! These type of paphs like light in the low to medium range. Mine does great getting a few hours of filtered sunlight (Tinted window with screen), and others are happy being on a plant cart under flourescent lights. Don't let them get too warm.. Try a little bloom fertilizer on your stubborn ones. Sometimes that helps - other times you just have to wait till the plant decides it wants to bloom. Deperle is a lovely bloom, and as the plant matures the blossoms will get larger.
Good luck, post a photo when it blooms!