On Board Trains Occupational Health and Safety Regulations

3.2 For the purposes of this Part, the level of lighting in an area shall be measured

• (a) where work is performed at a level higher than the floor, at the level at which the work is performed;

• (b) where the source of lighting is at floor level, at the floor level; and

• (c) in any other case, 1 m above the floor.