Mostly That yeah. I still don't understand how to handle interior light properly. Either everything is white or everything is black /D
That room has lights as part of the package. Content Library, then find STZ_Bedroom_6, load the full scene, and in the STZ_Bedroom_6 Lights subdirectory you have Lamp_Off and Lamp_On (select the lamp in the room and then double click Lamp_On. Also you can create a light in the room: Top left menu Create then choose New Distant Light or New Spot Light, etc. Once you create the light, then select it and in Parameters, go to Light and then Photometrics, there you vary the intensity and light colour. Also, the room has windows so you could create a light outside and position it so that it shines into the room through the windows. There are also other ways of creating light (e.g. emissive surface). To see how the light you created affects the scene, go to Render Settings, Environment, Environment Mode. Ah, one more thing. When you are using a Camera view, select the camera, then go to Parameters, Headlamp, Headlamp mode. I turn off the headlamp. Effects of all of the above are best seen in NVIDIA Iray preview mode.