By its very nature such friction on the axle creates drag and therefore reduces the number of coaches that can be pulled behind a locomotive. The Maglight system consists of an LCD strip, small button battery and a reed switch.
Hornby R7338 Maglight Lighting for 4/6 Wheeled Coaches
Hornby R7338 Maglight Lighting Unit for 4/6 Wheeled Coaches OO Gauge
R7338 Hornby OO Gauge (1:76 Scale) Maglight for 4/6 Wheeled Coaches New Tooling
Hornby R7305 Maglight Lighting Unit for Mk3 Coaches - Spare Parts and Train Accessories for Hornby OO Gauge Model Railway Sets, Coupling and Modelling Tools - Maglight Lighting Unit, Scale 1:76
Hornby R7305 Maglight Lighting Unit For Mk3 Coaches Acessories Scale 1:76 Gauge