Apply the “CC Light Burst 2.5” effect to the layer. Adjust the center point as the “origin” of the light. If you want the color to be the same as the original, simply check the “set color” box and then use the eyedropper or color swatch to choose the color. In order to make the “light” appear to be coming from behind the object apply the “CC Composite” effect and uncheck the “RGB Only” box and choose the “In Front” for Composite Orginal. For a similar look, try the “CC Light Rays” effect instead of the the light burst effect. This one is especially nice when animated through text. I hope this helps!