Direct replacement for 28W TC-DD compact fluorescent lamps in bulkhead fittings etc.M. Remote Microwave sensor module may be fixed in the luminaire to detect movement. Remove the fluorescent starter switch and replace the fluorescent lamp. For maximum energy saving bypass the ballast (electronic ballasts must be bypassed). 100 Lumens per Watt output allows compliance with the Building Regulations Approved document L2A/B requiring the use of energy efficient luminaires in buildings other than dwellings. Suitable for use in offices, warehouses, car parks, stairwells/corridors etc or difficult access/maintenance applications. Instant start without flickering. Life to 70% Lumen maintenance - 30,000 hours. Non-dimmable. 2 Year guarantee.