Article R4223-4 of the French Labour Code
While workers are present in the places referred to in Article R. 4223-1, the illumination levels measured at the work surface or, failing that, at the floor, are at least equal to the values shown in the following table: WORK AREAS and their outbuildings MINIMUM VALUES illumination Indoor circulation routes 40 lux Staircases and warehouses 60 lux Work areas, changing rooms, toilets 120 lux Blind rooms used for permanent work…