On Board Trains Occupational Health and Safety Regulations

3.2 For the purposes of this Part, the average level of lighting at a task position or in an area shall be determined

• (a) by making one measurement at four different places that are representative of the level of lighting at the task position or that, in an area, are representative of the level of lighting 1 m above the floor of the area; and

• (b) by dividing the aggregate of the results of those measurements by four.