Emergency lighting saves lives during evacuation. We explain the testing regime, maintenance requirements, and common compliance failures under BS 5266.. Why Emergency Lighting Matters When a fire disrupts the normal power supply, emergency lighting provides the illumination needed for safe evacuation. Without it, escape routes become impassable in buildings with limited natural light — particularly: Internal corridors Stairwells without windows Basements Large open plan spaces Windowless rooms BS 5266 1 Requirements The standard specifies emergency lighting for: All escape routes Open areas larger than 60m² Toilet facilities larger than 8m² Motor generator, control, and plant rooms Covered car parks Lift cars Moving staircases and walkways Areas of changed floor level Emergency equipment locations (fire alarm call points, extinguishers, first aid) Performance Requirements Minimum 1 lux on the centre line of escape routes 0.5 lux minimum at any point on the escape route Uniformity ratio not exceeding 40:1 (centre line to band) 50% of required illuminance within 5 seconds Full illuminance within 60 seconds Duration : minimum 3 hours for most premises (1 hour if building can be evacuated and not re entered) Testing Regime Monthly Functional Test Simulate mains failure to each luminaire Verify all luminaires illuminate correctly Check indicator lights on self contained units Duration: brief test (just long enough to confirm operation) Record results in log book Annual Full Duration Test Operate emergency lighting for its full rated duration (3 hours) Check all luminaires remain illuminated for full period Measure illuminance levels on escape routes Battery condition assessment Full photometric survey (recommended, not mandatory) After Any Test Ensure all luminaires recharge fully Allow minimum 24 hours before next test Replace any failed luminaires promptly Update maintenance records Common Compliance Failures 1. Insufficient Coverage Dark spots on escape routes between luminaires Missing luminaires at changes of direction No emergency lighting in large toilets Omitted from plant rooms 2. Testing Failures Monthly tests not carried out or recorded Annual duration test not performed Defective luminaires not replaced promptly Test results not documented 3. Battery Degradation Self contained batteries have finite life (typically 4 6 years) Degraded batteries fail to achieve rated duration No planned replacement programme 4. Modifications Not Updated Building alterations creating new escape routes Partitions blocking emergency lighting coverage Change of use requiring additional lighting Technology Trends Self testing luminaires : Automated monthly and annual testing with remote reporting Addressable systems : Individual luminaire monitoring from central panel LED emergency lighting : Longer battery life, lower energy consumption Wireless monitoring : Retrofit solution for existing buildings For emergency lighting design and compliance, contact Magnus Opifex.