Brightness

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 24 24"
>
    <linearGradient
        id="linear-gradient"
        gradientUnits="userSpaceOnUse"
        x1="-7.098"
        x2="13.189"
        y1="22.513"
        y2=".723"
    >
        <stop offset="0" stop-color="#1ba0db" />
        <stop offset="1" stop-color="#57bf99" />
    </linearGradient>
    <linearGradient
        id="linear-gradient-2"
        x1="-9.352"
        x2="10.935"
        y1="20.415"
        y2="-1.375"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-3"
        x1="-1.852"
        x2="18.434"
        y1="27.397"
        y2="5.607"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-4"
        x1="5.13"
        x2="25.417"
        y1="33.897"
        y2="12.108"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-5"
        x1="-2.369"
        x2="17.917"
        y1="26.915"
        y2="5.126"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-6"
        x1="2.876"
        x2="23.163"
        y1="31.799"
        y2="10.01"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-7"
        x1="-7.467"
        x2="12.819"
        y1="22.169"
        y2=".379"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-8"
        x1="3.246"
        x2="23.533"
        y1="32.143"
        y2="10.354"
        href="#linear-gradient"
    />
    <linearGradient
        id="linear-gradient-9"
        x1="-2.111"
        x2="18.176"
        y1="27.156"
        y2="5.367"
        href="#linear-gradient"
    />
    <circle cx="12" cy="2" fill="url(#linear-gradient)" r="1" />
    <circle cx="5" cy="5" fill="url(#linear-gradient-2)" r="1" />
    <circle cx="19" cy="5" fill="url(#linear-gradient-3)" r="1" />
    <circle cx="19" cy="19" fill="url(#linear-gradient-4)" r="1" />
    <circle cx="5" cy="19" fill="url(#linear-gradient-5)" r="1" />
    <circle cx="12" cy="22" fill="url(#linear-gradient-6)" r="1" />
    <circle cx="2" cy="12" fill="url(#linear-gradient-7)" r="1" />
    <circle cx="22" cy="12" fill="url(#linear-gradient-8)" r="1" />
    <circle cx="12" cy="12" fill="url(#linear-gradient-9)" r="8" />
</svg>