Preview:
Lamp Design.
Step 1:
Let’s start out by creating a new file. I used a 300×400 pixels canvas set at 72dpi, and I filled my background with #202020 color shade. Now make a new layer set then name it 'Lamp Design'.
In a new layer draw an ellipse with #6D930A color shade and 168 x 145 px dimensions. then cut the bottom half of your green ellipse.
Step 2:
Under Layer Style(Layer > Layer Style) add an Inner Shadow and Gradient Overlay blending options to your half ellipse layer.

Result:
Step 3:
In a new layer draw a shorter ellipse with #5E7B1A color shade and 169 x 18 px dimensions.
Step 4:
Under Layer Style(Layer > Layer Style) add a Drop Shadow, Inner Glow and Gradient Overlay blending options to the shorter green ellipse layer.

Result:
Step 5:
In a new layer draw a small white ellipse then apply a blur effect through Filter > Blur > Blur More. Then set the layer's opacity level to 19%.
Step 6:
Create a new layer, behind your lamp design draw a smaller green ellipse with 57 x 43 px dimensions.
Step 7:
Under Layer Style(Layer > Layer Style) add an Inner Shadow, Inner Glow and Gradient Overlay blending options to the smaller green ellipse layer.

Result:
Step 8:
Create a new layer and draw a small black ellipse on the smaller green ellipse design. Then draw a small green ellipse with #496900 color shade just below the small black ellipse.
Step 9:
In a new layer draw a thin rectangle with #EEEEEB color shade and 9 x 67 px dimensions on small black ellipse.
Step 10:
Under Layer Style(Layer > Layer Style) add an Inner Shadow, Inner Glow and Gradient Overlay blending options to the skinny gray rectangle layer.

Result:
Results:
Lamp Design.