What brighter illuminates the Earth: Sirius (-1, 5m) or all the stars from 5m to 6m, of which there are about 1600

What brighter illuminates the Earth: Sirius (-1, 5m) or all the stars from 5m to 6m, of which there are about 1600 in the hemisphere of the night sky?

Answer: All 5th and 6th magnitude stars have a total luminosity of approximately 2.5 times that of Sirius.

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