@herf
Mine is (please, see my updated profile), my room has 17.22m2 with 1.28m2 window at near 2m from my back with no direct sunligh (w/ two LED white-light E27 7W 6500K). Tomorrow the sun will rise at 6:55 and the sunset will be at 20:53 (summer european local time). At December 6th, the sun will rise at 7:53 and sunset will be at 17:25 (this will be the minimum time here for sunset this year, while winter local european time). I hope it will help for something. :)
Edit (1): edited exact location for privacy issues, thanks TwoCables. :)
Edit (2): solved, please see https://forum.justgetflux.com/topic/4036/how-to-set-exact-location/3