Gaugemaster Modern Single Head Adjustable Height Lamp Value Pack A \"Super Value pack\" of 8 x finely scaled single-head (sylvania light module) station, carpark or road lamps. Single lamps are often used on platforms with greater security/communication so Four lamps also have an adjustable CCTV/speaker. Height adjustable. LED powered (Modern white light). The Lamp posts are made from medical grade stainless steel tubing. Bases are ABS and feature al detail. Light control PCBs are included. Connection instructions on rear of each pack, with a PDF \"tips\" file also available online. Designed and created to 4mm scale (OO/EM/P4). However, as lamp heads can vary in size in the real world and scale differences are very small they look fantastic on HO layouts too. These lights require a 12v DC supply to illuminate them. We recommend using the GMC-WM4 plug in transformer as it will supply your circuit with a regulated 12v DC power source. Do not use a 16v AC supply for these lamps as they will blow.