Go to "Background" layer in the Layers Palette, go to Filters > Render > Lens Flare [or you can hit Alt+Commad+F to bring up the last used filter dialog] change Brightness to 100% and apply. Go to Filter > Blur > Gaussian Blur and apply with a Radius of 45 pixels. Then go to Image > Adjustments > Hue/Saturation and set Lightness to -20. => 90, Altitude => 65.