The room lighting around my dark floors/walls/ceiling was shutters partially open. In addition, seven 50 watt equivalent down facing LED lights are on in the back half of the room, and along with incoming light from the windows, lights up the couch. It’s plenty bright in the back of the room despite the surfaces being very dark. A fair amount of ambient light is hitting the screen and you can see that it’s washing out the image a bit. It’s still a good looking image though. I wouldn’t normally have the shutters anywhere near that open for real watching, and I’d still have plenty of light to work with in the back.
Above and below, two identical photos except for the exposure. The first of the pair gives you a reasonable idea of the room lighting.
The second looks darker so that you can get a better idea of how good the picture actually looked.
More importantly take a look at another HDTV NFL image. Most impressive: