Starburst.

I did a bit of research this arvo to find out what this effect around the lights is called.
And this is what I found.
My EXIF data will give you an idea of my settings.

Look large to see it better.

Plus as you might know "Blipster" the app is no longer with us. I loved it.
Forum Discussion here.
I'll just have to get used to the other one.