Off Topic Lights, screens and electrical things

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We're talking about the floodlights, not the big screens and the floodlights have been specially designed not to trigger photosensitive epilepsy and have never triggered it in anyone, despite the lights now being a requirement in the Premier League and being used by many clubs in Europe.

We were talking about the screens. Glad we've cleared that up.
 
Whatever you sat through. It's wrong. The end. Moving shapes on any screens LED/Plasma be it light or simply images moving on the screen can trigger photosensitive epilepsy.

Last time I was at a match they showed goal replays? Moving images?

It's not the moving images, it's the flicker rate (hertz). On the screens and the floodlights the flicker rate is above those levels that usually trigger photosensitive epilepsy.
 
Its a good job they don't put a sign up now that says, if you feel ill contact a steward. They wouldn't be enough stewards to handle the rush.
 
Also moving images.

Nope. Flicker rate or in some cases, specific patterns. Most of the lights you see nowadays are flickering faster than you can perceive. This boring video will show you how screens set it off.

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My sister developed photosensitive epilepsy during her first pregnancy. It was triggered when she travelled beneath some trees with the sun above them. The speed she was travelling and the density of the branches created the (im)perfect flicker rate.