There is no Florida law that prohibits light-flashing, said Oviedo attorney J. Marcus Jones. He claims officers are simply twisting a law that was designed to prohibit drivers from adding after-market emergency lights to their vehicles. When officers write those tickets, he said, they violate a driver's constitutional right to free speech. If motorists want to flash their lights to warn about a speed trap ahead, they are free to do so, according to his suit.