You need to take pictures of the scenery and panel-cranes in the city (light structures that adorn the city, lampposts, streets).
1) survey of 20-30 designs (day + night)
2) a detailed survey of individual objects with a ruler so that photographs can be drawn drawings
Being a professional designer means to understand all the requirements of the clients, and find the best way to implement it with highest quality.
Link for my portfolio :- https://www.freelancer.in/u/multiwaygraphic.html
Thanks & Regards
Sukhchain