Light of Heaven Premium Action set . This set contains 2+4 Photoshop actions with styles that will allow you to create realistic rays of light effects and also give you complete control over different light effect creation.
In the help file screenshot is provided how to use this user control action at file and also there is another atn file with default effect. Txt help file also provided on how to install it.
The result contain easy to edit layers with layers styles intact so that you can customize the effects.