If you're into creating with Adobe Photoshop here's a cool tutorial by Andrei Oprinca that will show you all the steps to create some pretty interesting effects.
Here's the final image from the tutorial:
Here's a video walk through that will give you a good idea of what the tutorial is all about:
You will need the author's Colors in Motion – light textures pack which he offers as a free download, under a creative commons license.
Andrei offers a number of tutorials on his PSDBox profile as well:
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