BPS PHILIPPINE NATIONAL STANDARD 2050-4:2007 ICS 29:140.30, February 17, 2011
LAMPS AND RELATED EQUIPMENT – ENERGY LABELING REQUIREMENTS – PART 4: BALLASTS
National Administrative Register February 17, 2011
Text Available at Office of the National Administrative Register, U.P. Law Complex, Diliman, Quezon City
Date Filed: 17 February 2011