The Lite-Plan HRN/T5/6/28+54 Module is a 3hr emergency lighting module. Specifically designed for use with 28w & 54w T5 fluorescent lamps.4-pole change over relay plus additional 5th pole for HF ballast isolation. This Lite-Plan conversion kit has the following benefits :- Specific T5 lamp calibration to maximise BLF%, 4 pole changeover relay, additional 5th pole relay, Deep discharge protection, Low profile enclosure, constant current charger and high temperature NiCd cells.