A bright flashing light (like that from a wide screen TV when fed with the right signal) can cause certain people to experience slight dizziness or even epileptic fits (seizures) if the flash is at approximately 12Hz. This even happened in one episode of a popular anime and hundreds had symptoms and even some American after the event was put up on the news (back then anime wasn’t very popular in America). If you filled the remaining space in this circuit with 2.51V lamps you might even feel a bit dizzy yourself.
