I did something similar to this a while ago. We used three (three windows) 1,2kW Arri HMIs with 1/2 Stop Frost on 48" Frames as main, and then two 575W for a bit of fill. If you want, I can send you a picture, unfortunately, I can't post the results yet.
We were shooting in Berlin, so I knew that the weather was incredibly unpredictable and we needed a constant and reliable light source, so daylight was very much out of the question. I assume Stockholm, if that's where you're shooting, might face the same problem.