The liteplan hrn 3 conversion kit is a 3hr emergency lighting conversion kit suitable for 4 36w fluorescent lamps this unit is to suit multiple 4 pin fluorescent lamp wattages and circuits 4 pole change over relay plus additional 5th pole for hf ballast isolation this conversion kit has these additional benefits 4 pole changeover relay additional 5th pole relay deep discharge protection low profile enclosure constant current charger high temperature nicd cells the hrn range is suppli