Drop Shadow and use the same settings for the drop shadow as in Step 2. Deselect the area. Add a new later and name it red globe . Use your Selection tool set to Circle, Feather 0, Antialias checked. Draw a circle at the top of the pole, see image below for example.
Flood fill with red.
Do NOT deselect circle area yet. Deselect the area. Add a new layer and name it glass globe . Use your Picture Tube Brush , and look in the Tool Options Box and find the glass globe tube you have installed. Depending upon the size of the circle you drew, you will have to adjust the size scale of your tube - I used a scale of 50 for mine, yours may be different.