I made this lamp just using 10 pvc elbow joints, embed togheter and painted and a rgb bulb with remote control bought from ebay. Cable, switch and plug of course.
I did not glue them so every single joint can rotate so I can create several versions, depending on my needs.
I capped the hole with a car-oil can and painted it.
NB: FIRST Make a hole and let the cable pass through without switch nor plug THEN make all the connections