A QUICK TUTORIAL : http://www.youtube.com/watch?v=I4Mx9nBOnBA
30 Light Refractions
30 x .png files, so you can simply drop them onto your work.
They are all 3000×2250.
They are easy to change colors in a graphics editing program and can be layered on top of each other to achieve more effects.
Try experimenting with layer blend modes. To create a nice blend between the light and your image then set the blend mode to “Linear Dodge (Add)”,”Screen” or “Lighten”.