2 exterior solar lights placed at the front of the trailer and by the door on the passenger side. 
 
These Lights have 3 Different Mode Settings:
Mode 1:Constant Lighting- It will auto turn on light during the night time or at the dark area and auto turn off during the day time ot at the bright area.
Mode 2:Motion Sensor+ Dim Lighting- It will auto turn on dim light at night, when people come close about 3-5m, it will turn on bright light for 20-25 seconds and switch to dim light after no human motion.
Mode 3:Motion Sensor Lighting- During the night time or at the dark area, it will auto turn on light when it sensing human movement, and it delays 20-25 seconds when people walk out of its sensing range, then it will turn off.
 
Or you can completely shut it off at night.