Solar Light Fence mount

My first ever 3D design, knocked up in TinkerCad. Just a little bracket for mounting solar garden lights to a fence post. Printed on Creality Ender 3 Pro with 25% infill and supports generated. Suggest printing rotated 90 degrees as shown in picture to minimize supports and print time.

This is my first attempt at designing an object myself so any and all suggestions or improvements are welcomed.

Update.

2nd file added with a slightly slimmer downtube. Gives a better angle for solar lights with a thinner stake.