Labs project was initially started for showcasing realtime GI feature in Unity but later, due to scale of the project it was dropped. For demonstrating new light modes, I stripped some assets from the project to prepare this scene setup. It was used for Unity 5.6 blog post and release notes.
I authored the lighting for new mixed lighting in Unity 5.6 and created some prop assets for the environment. Currently, parts of this scene can be downloaded from my Github repository. There is also an accompanying tutorial on my blog to explain new mixed light modes.