Notes: These tables are based on the following factors:

Light output ratios measured to BS5225 and lamp lumen outputs are from GE Lighting Warm white lamps.

Requirements from BS5266/EN1838

Permanently unobstructed escape routes:

Require minimum 0.2 lux along the centre line of the escape route, where there is a possibility of an obstruction occurring along the route 1 lux minimum is required.

Undefined, Open areas

The minimum level of illumination required throughout the are is 0.5 lux excluding a half metre border around the edge of the room which can be at a lower level.