Use the Outer glow option to add a very slight grey border, adjusting the Spread to the Max will turn the default glow into a solid strip of colour which helps add this double stroke effect.

继续用外发光来添加一个浅灰色的边，调整扩展值到最大这样我们可以得到一个双边线效果。

youdao

Light sent into the oil layer was confined there, bouncing between the metal and air boundaries. The beam spread out ever more quickly, generating a trumpet-shaped glow (see image).

当把光传入油层后，就被约束在那里，光线在金属和空气的边界之间不断反弹，于是产生了喇叭状的辉光(见图片)。

youdao

Chinese paper laterns are perfect for achieving soft lighting because they nicely diffuse the light and spread the glow in all directions.

中式纸灯笼能够提供柔美的灯光，因为这种纸灯笼能够让灯光均匀、柔和的散射到各个方向。

youdao

And on this dazzling sheet, spread under the blackness of the clouds and emitting a bluish glow, Captain MacWhirr could catch a desolate glimpse of a few tiny specks black as ebony, the tops of the hatches, the battened companions, the heads of the covered winches, the foot of a mast.

FORBES: Has Sandy Capsized Your Life? Here's One Thing To Be Thankful For