Soft light Effect in photoshop
1. Duplicate the image in other layer
2. User Gaussian Blur on duplicated layer upto 12-14px
Filter > Blur > Gaussian Blur.
3. Reduce the Opacity of the Blurred Layer, say by 50-55%
4. Add layer mask on the Blurred Layer
5. Now user brush to clean the face and parts of the image to bringing back the original details of it, especially on the face.