Here are some stills from an upcoming project that I shot called 'Louis Bernard'
I used a arri 2k as the key light through the window of the set and an arri 650w as a fill bounced into the set from the ceiling. I also used the lamp as a nice piratical.
I shot it on the Blackmagic URSA 4k. I would have loved to had the 4.6k as it has more latitude and better low light performance. As the native iso was 400, we had to use very powerful lights and up the gain in post. Apart from this it is a wonderful camera that can shoot beautiful 4k Prores 444 in camera.