Registered Community Design 390612-0003(fitting). Registered Community Design 000973912-0003 (lamp). UK Patent GB2426321 (fitting). 50 Lumens per Watt output allows compliance with the Building Regulations Approved document L1A/B requiring the use of energy efficient luminaires in dwellings. Special SGU10 lampholder prevents insertion of halogen lamps. Integrated intumescent material completely seals the downlight and cut-out in the event of a fire. Tested in 30, 60 & 90 minute fire rated ceilings. Tested to BS476 Part 21. Tested to BS EN ISO 140-3:1995 & BS EN ISO 140-6:1998 (Acoustics) confirming that they maintain the ability for an internal or separating floor to provide sound insulation. Range of floating glass lock rings available to customise your installat.