LED lights and seizures

[valeriedl]

Do LED lights have any effect on people and can cause seizures?

I have a friend who went for a drive to see the Christmas lights around where she lives and had a seizure later when she came home. She didn't know if the lights could have had any effect on it or not.

 

[Nutella]

"Flashing bicycle lights or other LED lights, if this creates a high enough flash rate against a dark background, and if the effect fills your vision."


So I guess it can.

 

[valeriedl]

She didn't say if any had been flashing I'll have to ask her, she just said that some were really bright.

 

[skyfire322]

Really bright LED's don't give me seizures, but if I'm around them for an extended period of time, I begin to get auras.

 

[fluff4brains]

Just thinking out loud...

I use specialist LED lamps in video work, and often film in locations with LED 'Mood' lamps that have variable colour and intensity.

The variability is created by pulsing the LEDs very, very quickly - supposedly faster than the 'persistence of vision' trick used in TVs and at the cinema, but other research has shown that we perceive flicker up to 300 Hz, and I can definitely pick up flickering issues with variable colour LED lamps at 1/300th of a second shutter speed on my cameras.

The biggest issue that I get is with a mis-match of frequencies which causes a 'beating' or 'standing wave' effect that's not necessarily 'visibly visible' to the human eye, but very noticeable to the camera (usually a dark bar that wanders up or down walls).

So just as CRT monitors could cause eye strain, there may be something about LED mood lighting that some epileptics sense where others don't?