Budget Dahua Cams or china alternatives under $100?

 
can you help me choose between camera models at a low price. J hesite between several models of the dahua brand. I need a camera capable of filming a person opening a door 9 meters away and apporoching up to about 4 meters from the camera.

IPC-HDW2230T-AS-S2 0.005 lux. @F1.6
IPC-HDW2239T-AS-LED-S2 0.0017 Lux@F1.0 ............. fullcolor
IPC-HDW2231TP-AS-0280B-S2 fixed lens 0.002 lux@F1.6
IPC-HDW2431T-AS 0.008 Lux @ F1.6

.... and maybe.... (up to 100 USD)

IPC-HDW2231TM-ZS-S2 0.002 Lux @F1.6
thanks
 
Hard to say without seeing the scene. Light, direction, etc . Without seeing it I’d say the varifocal
 
Which one, 2231 or 3241?