How bright can a typical supernova momentarily become relative to the galaxy that hosts it?

Answer

It momentarily outshines the combined output of the billions of stars in its host galaxy.

A supernova is so energetic that for a brief period, it momentarily overpowers the combined light of all the billions of stars in the galaxy where the explosion occurs.

How bright can a typical supernova momentarily become relative to the galaxy that hosts it?
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