Applications of sl-d killer search lights are : defence forcespolice & para militarylaw enforcing agenciesbuildingsinstallationsairportsrailwaysbus terminalsmallsmarketscinemasmultiplexesfarmshouseslocalitiesforestsdams etc etc technical specifications: high powered halogen lamp 55w12v 7 ah maintenance free leak proof sealed battery60 minutes (10min) continuous operation on full chargeblack color, 3mm thick absglass filled nvlon body25cm l, 16.5 cm front dia & 13.5cm rear dia (approx.)input voltage 220+ 10% ac single phase 50 cycle regulatory (timer) circuit providedweight approx 4 kg.led indications for system on, adv low battery indicator, low battery indicator, ac dc blown fuse indicator.