Cool white for modern coaches with fluorescent or LED lightingEasy to fit in seconds - No wiring No switch - turns on automatically as the train moves, turns off 4 minutes after last movement so lights stay on in stationsNo pickups so works on both regular DC or DCCTraditional warm white or modern cool white lightingLights stay bright and constant with no flickeringFits most OO/HO coaches; lighting strip is 8mm wide x 220mm long (but may be cut down).Battery is the popular 20mm diameter 2032 coin cell - lasts months in normal use, years in standbyIncludes fitting guide and battery.Each lighting strip is completely self contained with a built-in long life battery and five efficient LED lamps which realistically light the shortest Gresley to the latest Pendolinos There is no need for any switch because the strip incorporates a small sensor which detects when the train moves and turns on the lights automatically. The lights stay on whilst the train is in motion, then after it stops keeps the lights on for a few minutes before turning them off so that temporary stops at stations or signals leaves the coach lit.WARNING : Button/coin batteries can cause severe injuries or even death when swallowed. Keep batteries out of reach of children. If you suspect a child has swallowed or inserted a button/coin battery, seek medical attention immediately.Due to postal regulations, battery will not be included when sent outside the UK