The Decepticons are the trouble maker faction in the Tramsformer mythos. They are typically concerned with such things as conquering Cybertron, defeating the Autobots, amassing large quantities of energon, developing powerful weaponry, and beating people up. Not necessarily in that order.
Here is the Decepticon Shield as a 3D super cool decoration and night-light. Colours are constantly changing and with the included wall sticker it appears as if the Autobot shield was just smashed through the wall.
Light Source: Multi-Colour LED
Power Source: 3x AA Batteries