Gradients For Light Effects
To get a nice light effect, press D then X to set your Foreground color to white and your Background color to black. Go to Layer>New Fill Layer>Gradient, set the Mode to Soft Light in the New Layer dialog, and click OK. Click on the Gradient thumbnail in the Gradient Fill dialog, and choose Special Effects from the Gradient Editor’s flyout menu. I love the Soft Stripes preset to create a light effect. Don’t forget to play around with the angle, opacity, color stops, color, etc.
by Calvin Hollywood