The parameters of the
Green light:
Blending Options>Outer Glow
Blending Options>Gradient Overlay 
Gradient’s parameters:
The parameters of the
Blue light:
Blending Options>Outer Glow 
Blending Options>Gradient Overlay
Gradient’s parameters: 
On the next stage we’ll create a new layer (
Create new layer) and select the
Paint Bucket Tool (G) to paint the new layer in black. Select after that the
Brush Tool (B) to represent the colored luminescence, coming from the lights. This layer should be placed lower than the layers containing the colored lights (on the layers’ panel).
Select for the last created layer next option:
Filter>Blur>Gaussian Blur
Create one more new layer (
Create new layer) and choose the
Paint Bucket Tool (G) to paint it in black. The new layer will be placed lower than the layers containing the colored lights (on the layers’ panel). Use after that the
Eraser Tool (E) and
Opacity of
20% to erase the elements as below for getting the same result:
The picture is finished!
View full size
here.
