You must have some really high gamma settings then if you believe it was brighter then the sun light. Good for you.
I begin to experience headaches after only 30 minutes. It may vary for others. I have only played a Max of like 3 hours straight since the event started at the end of those 3 hours I had a migraine that lasted another four. Please find further research to this below…
Blue light penetrates very deep into your eyes causing eye strain. Blue Light Exposed explains that: “Most of us spend the majority of our waking hours staring at digital screen, whether it’s the computer at work, our personal cell phone, playing a video game, or just relaxing and watching TV. Digital eyestrain is a new term used to describe the conditions resulting from the use of today’s popular electronic gadgets.
Blue light and migraines : “Fluorescents, LEDs, TVs, computers, smart phones, and other electronics that emit blue light disrupt our sleep patterns at night. Additionally, these devices do not provide a constant source of light. They are actually flickering. This flickering from artificial lights has been reported to trigger migraines and is well known for causing eye strain and headaches. The combination of eye strain, oxidative stress, and sleep disruptions make blue light dangerous for migraine sufferers.” (source)
Video : https://www.webmd.com/eye-health/video/video-blue-light-health-risks
Another article on blue light : https://www.webmd.com/sleep-disorders/news/20170619/is-blue-light-bad-for-your-health
All of this research only took me 30 minutes.
“Excessive exposure” can differ from person to person but one thing Is clear in each article and supporting sources is that blue light will have an extremely negative effect on everyone either they notice it quikly like myself in 30 minutes or in a few hours it’s effecting them.