The City is responsible for the operation and maintenance of street lighting, policy development, budget control and administration. http://mississauga.ca/streetlighting
The design and maintenance of all streetlighting work is contracted to Enersource Hydro Mississauga
To report a streetlight out on any Mississauga street, contact:
Enersource 905-566-2718 or go to the website: http://www.enersource.com
For other stuff that makes up Mississauga, see Infrastructure