when you donwload this set [link] of brushes you are downloading:
- 2 diferent beams (adjustable size)
- 3 diferent finish to give to your own beam
- 3 diferent beginings (diferent sizes and brightnes)
- 7 diferent special effects to give to your own beam

to proper use this tutorial but if you dont want to read it here are some usefull tips:

- click a few times after moving the mouse because the brushes have less bright, just click from 3 to 6 times instead 1.
- to get a better effect add a color balance layer with all the highlights at -100 in Yellow/Blue.

i will fav++ all desings with a beam made with this method so, leave me a link to see what you do.
if you find this set usefull i will apreciate if you fav++ it so more ppl can find it.