And the Earth is a huge shiny very reflective thing, compared to the Moon which is all a dull powdered rock and a lot smaller. So I think you'd be wearing your sunnies if you were standing in that earthshine-lit part of the Moon - much brighter than the full Moon shining on the Earth.
By the way, the smiley face Moon (OK, Crescent Moon), go directly out from the bottom of the smile and that is the direction to the Sun
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