No that's real Bokeh.
Layer 1: Background, white fill, 100% opacity.
Layer 2: OoF fairy lights (photo), 50% opacity, normal blending
Layer 3: OoF fairy lights (photo), 50% opacity, "lighten" blending
Layer 4: Layer 3 duplicated and rotated 180║.
Layers 2,3,4 were then flattened. Saturation and contrast were both reduced. Curves used to lighten the shadows.
Layer 5: ~15% opacity white fill
Layer 6: ~20% opacity white fill vignetting (it's clear in the middle
Layer 7: Product photo
I reduced the saturation in the product layer, decreased the highlights relative to the rest of the tonal values in that layer and finally lifted the levels in their entirity. Finally the all the layers were flattened.
So yes the image is heavily photoshoped, but the bokeh is genuine. It's Nikon 85mm f1.4 bokeh - which the more I look at it, the more I like it.
Tha main difference between the earlier dark images and the later light images is that the earlier ones were shot at night and the later ones were shot in front of a window covered with a sheet of thin linen to diffuse the light.