This has been applied for decades. Those 'ceiling windows' in art galleries are often false windows with bright daylight lamps beneath it.
By the way, the sun produces ~50.000 lux on earth's surface. That's 100 times more than in a wall illuminated office.
To reach that brightness, you would need tens of kilowatts of LED lightning for medium and larger sized rooms. That's totally infeasible. Also, imagine the heat building up. It will literally be like a greenhouse in your room.
So in reality, no one actually aims for the brightness of the sun. But just something fairly bright at a high ('cool') color temperature. That produces the same sensation.
Many people (including myself) find such brightness levels uncomfortable, and wear sunglasses.
Sunlight is free, but electric light is not. This is why light in my apartment is very bright but not nearly as bright as the streets on a sunny summer day.
Perhaps in theory, considering that when you look at someone's face outside on a sunny day, it is brighter than that. OTOH, staring directly into a lightbulb isn't pleasant, so I suppose there's more to this.
Either way, I think the best way to deal with bright light isn't a brighter screen. It's an unlit screen, like e-ink or something.
He's of the concave theorists, which take the flat Earth society one step further, and believe the Earth is concave.
And surely for them, you can see the horror of such large amounts of light being funneled, being reflected back and forth, over and over. So no, most assuredly, he does not look at the Earth!
Depends on distance. They make e27 screw in LED bulbs that will put out over 5,000 lux but you would need to hold the bulb pretty close to your face to get the full value of it.
By the way, the sun produces ~50.000 lux on earth's surface. That's 100 times more than in a wall illuminated office. To reach that brightness, you would need tens of kilowatts of LED lightning for medium and larger sized rooms. That's totally infeasible. Also, imagine the heat building up. It will literally be like a greenhouse in your room. So in reality, no one actually aims for the brightness of the sun. But just something fairly bright at a high ('cool') color temperature. That produces the same sensation.