Gear:

• Canon EOS 200D
• Tokina AT-X Pro SD 11-16mm f/2.8 (IF) DX
• Tripod

Weather:

• Light cloud cover

Location:

• Garden

Software

• Rawtherapee - RAW file importing, optical correction & image processing
• GIMP - RAW/TIF to JPEG, cropping

The Tokina lens suffers from quite bad chromatic aberration (red/blue/green ghost images) in long exposure night images as seen in this crop from one of the images below:

Fortunately Rawtherapee takes care of all but the most severe defects when you import it.

Unaltered JPEG images on the right, processed images from the RAW files on the left: