darkness: 3.71 V => 4.31 MOhm
bathroom without lights, only outside lights: 3.68 V => 4.18 MOhm
kitchen light: 3.29 V => 2.89 MOhm
+room 30min before midnight: 0.26 V => 82 KOhm
+outside 30min before midnight: 0.05 V => 15 KOhm
bathroom halogen lights 0.02 V => 6 KOhm
battery light: 0.01 V => 3 KOhm