An employer must ensure that the emergency sources of lighting -
- are capable of being activated within 15 seconds of the failure of the lighting;
- will last long enough to ensure the safe evacuation of all indoor workplaces;
- are kept in good working order and tested for efficient operation at intervals of not more than three months;
and
- where directional luminaries are installed, these are mounted at a height of not less than two metres above floor level and are not aimed between 10 degrees above and 45 degrees below the horizontal line on which they are installed.