If you want a glare with lines it is easy to do in the compositor.
In your scene add an object and give it an emission shader and use a strength that is more than 1.
Then in the compositor add a glare node in streaks mode. Use the threshold value to determine what values get affected by the glare node (i this example any value larger than 1 will be affected by the glare). You can also choose the number of streaks you want: 