sass array with @for?

I would like make a array with a loop in sass, but i don't know is possible. There is my expected output:

$light: #fff;
$gray: (
    darken($light, 1%),
    darken($light, 2%),
    darken($light, 3%),
    darken($light, 4%),
    darken($light, 5%),
    darken($light, 6%),
    darken($light, 7%),
    darken($light, 8%)
);

And this is my actual code:

$light: #fff;
$gray: (
    @for $i from 1 through 8 {
        darken($light, $i%),
    }
);

P.S. This not working.