... 1.High power factor>98% 2.Ballast: Electronic 3.Philips cosmo CDM use 4.THD ... COSMO use Electronic Ballast1.Several advantages compared to conventional systems, such as:- Energy Saving.Ballast itself is ... and improve 12% luminous efficiency more than electromagnetic ballast. The power-factor of our ballasts is greater ... The content of harmonic is low in our ballast, so there is no interference to grid ...