Ok so i dont have a copy of bs 5266 so hopefully someone here has a good all round knowledge. Emergency lighting in a high risk fire industrial building (saw mill) do all emergency lights leading to an escape need to be maintained? A lot of ours on site are non maintained a mix of both (previous maintenance sparky installed them) and also at the outside of final exits maintained or non maintained? Im looking to upgrade everything to LED so would like to get everything up to scratch.