It’s iffy cause you can get a ticket for the prohibited use of alternating high-beam headlights. if the cops an ass. Because alternating flashing headlights are supposed to be for “emergency vehilces” the close resemblance of proof i could find was in this article. But i could be wrong
here is the link: Law Document English View | Ontario.ca
It is illegal to have alternating flashing headlights except for emergency vehicles.
HTA 169(2) – Prohibited use of alternating highbeam headlights - $85.00/$110.00
Highway Traffic Act, R.S.O. 1990, c. H.8