Represent on a new layer of
4x4 px and
72 dpi a kind of element like this one:

It should be done with the
Pencil Tool (B) of black color.
Save it!

Pick out again the
Ellipse Tool (U) to represent the glass of the lamps’ light filter.
Blending Options-Outer Glow
Blending Options-Inner Glow
Blending Options-Gradient Overlay
Gradient’s parameters: