Effects of Flicker on Different Types of 150-W High-Pressure Sodium Lamps and Ballasts. - Francisco J. Azcondo; Alfredo Ortiz 001; Mario Mañana; F. Javier Díaz; Christian Brañas; Carlos Renedo; Severiano Pérez; Fernando Delgado; Rosario Casanueva (IAS, 2007)