You simply cannot have a Christmas image without some kind of light bokeh floating around. This is my go to bokeh when it comes to my Christmas images!
 
What's Included:
- 5 Christmas Tree Bokeh Overlays
 
~ INSTRUCTIONS ~
Open the overlay you wish to use in Photoshop.
Then, unlock layer if needed, click, drag and drop the overlay onto you image!
From there you can rotate it, enlarge it and change the blending mode of the overlay to get the desired effect! The blending modes I use most are “screen”.
I also recommend lowering the opacity of the overlay because you do not want it to be too much. 
Finally, add a layer mask to the overlay and with a soft black brush at about 30% opacity, paint the overlay off the areas you do not want it on.