Light textures and brushes are useful resources in Photoshop manipulation. To create realistic light effects from scratch like sparkle, glitter, optical flare, fireworks and so on, is a very hard task not to mention that is time consuming. So most people use textures and brushes.
In this list I hand picked some amazing lightning textures and brushes that you can use in your photo manipulations. You can create real lightning effects by simply adding the texture and setting the blend mode to Screen; it can't get any easier than this.