Ontario Provincial Police say a vehicle using emergency red and blue lighting roared by a patrolling cruiser on Highway 410 Saturday night.
The officer pulled the vehicle over and, after investigating, seized two emergency light bars.
A 20-year-old from Mississauga is now charged with use of unauthorized red and blue lights and having cannabis readily available.
The driver also allegedly failed to surrender a licence, vehicle permit or insurance card.
Police also say his licence plate was obstructed.
The accused is to appear in court at a later date.