Yeah, they definitely have with the newer LED light bars compared to the old ones with bulbs. Police in my area usually turn half of them off (to where only the very edges of the light bar are flashing, the middle lights are off) once they pull someone over or stop at an accident scene. I feel like otherwise they'd just cause more wrecks due to blindness.

Ohio's state troopers have particularly awful ones. It's noticeable any time I drive through the state.

These high intensity alternating blue and red lights have to be giving some epileptic people problems, right?