ECONO-WATD Industrial Nuvo Electronic Ballasts have been certified by European Standard for safety. EN 61347-1:2001,EN 61347-2-3:2001 and Electromagnetic compatibility EN 55015 : 2000+A1 : 2001+A2 :2002, EN 55022, EN 61000-3-2/-3, EN 61547 : 1955+A1 : 2000, ( EN 61000-4-2/-3/-4/-5/-6/-11 from ELECTRONIC TECHNOLOGY SYSTEMS DR. GENZ GMBH, Germany. These four models of ECONO-WATD Electronic Ballasts, namely Industrial Nuvo 1x18W, 1x36W, 2x18W, 2x36W are recommended for supermarkets, hospitals and Industrial lightings