I've added a man to this composite and added shadow. I made the light source more distinctive above tree, a bit left. Based on this I draw green lines to figure out the shadow direction. The shadows for the lamps look quite long, it seems the sun is quite low then? I tried to make the shadow more sharp and stronger more near the subject and more blurry, wide and transparent further away it goes.
For both of the lamps I did lines, but the lines don't seem to meet in a light source - sun. Would last picture (https://i.stack.imgur.com/AASTF.jpg) indicate a more accurate shadow direction?
Let me know your feedback.