DCD-MGS-MG Alpha Mimic 12x 4 LED UK Modern Ground SignalALPHA MIMIC 12x 4 LED UK Modern Ground Signal A pack of 12 x 4 lamp plug and play signals in 4mm scale (OO), complete with control board and accessories. The DCD MGS MG is a modern UK 4 lamp ground signal that uses LEDS in the prototype. It was first introduced around 2000 and is now being used to replace many 3 light signals as they reach the end of their life. This makes it a great choice for more modern layouts of many prototypes.