Light takes 8min. The satellite is placed st 1/10th of the distance to the Sun, so the warning for any light is only 0.8min. Light doesn't matter though, it's the dust kicked up from the Sun that does. That takes ~24 hrs, or longer to get here. That moving dust cloud is what the warning is for. What the satellite can see is the dust cloud interacting with Sunlight and itself. Folks on Earth can't see that, because it's covered up by the atmosphere and the Earht's ionized layers.
1/10th the distance from the Sun would be 9,300,000 miles.
The rest makes sense though.
Thanks,