It's a great gift for Slytherin house  fans. I've been working on this series of lights for half a year already, and this sweetie is  the first to see the big world. Of course, I am a HP fan, so new designs are on the way.
Concerning the Slytherin Symbol, I used main colors of the House - green, silver, black.
I can make it bigger or smaller, also - just wall decor option is available. Meaning snake only, no light option. As a light - it can be made for direct into-the wall wiring, or I can add a cord, switcher and a plug, so You can use a standard socket. Color is no problem, I cam make any. Please, expect to give about two weeks for creating it. The one on the pics I still have. 
Remember, I am a living artist, who is actually creating stuff, so I can modify the main design in the way You need.
Feel free to ask any questions.

* More works here:  https://www.instagram.com/mariarty1211/