[the herald]

It's my understanding that the full moon is essentially 7% of the brightness of the sun in a clear sky as viewed from the earth. The issue here is relative brightness to the average human spectator, not the intrinsic brightness of the stellar body.
But in any case, your Madsci.org suggests that a supernova'ed Betegeuse would be about the same brightness as the moon, not ten times greater. That seems more likely than 10x the brightness of the moon. That's all I was saying...

[RockinRight]

The moon is much less than 7% as bright as the sun. I think it's 0.7%.

But, you're right. The MadSci article proves me wrong. It'd be pretty darn bright any way you look at it!

[Ichneumon]

It's my understanding that the full moon is essentially 7% of the brightness of the sun in a clear sky as viewed from the earth. The issue here is relative brightness to the average human spectator, not the intrinsic brightness of the stellar body.

Not nearly that much.

The Sun's illumination at noon on a cloudless day is roughly 10000 foot-candles.

For the full Moon at zenith on a cloudless night, the illumination is about 0.03 foot-candles.

So the Moon's brightness (as soon from Earth) is about 0.003% of the Sun's.