Suitable for use in offices public buildings hotels bars clubs restaurants schools health centres hospitals Robus present this LED replacement for T5 emergency bulkheads. With no UV or IR content it can be surface or recessed mounted with fully polycarbonate housing. It has an automatic self-test function once a week - test lasts 15mins. Can also be tested once a year in which case the test lasts 3 hours. Complete with 4 piece legend set tere is also a blade dropped legend accessory available (R8MULK-15). It has a large 4 terminal connector block allow loop-in/loop-out and is complete with NiCad battery providing excess of 3 hour emergency discharge duration complete with green LED charging indicator