Philips Advance Centium Electronic fluorescent ballast is suitable for use with two 54-Watt F54T5/HO lamps. It has voltage rating of 120 - 277-Volts and current rating of 0.98-Amp. Programmed start ballast with 1 ballast factor, offers 0.98 power factor. It has series lamp connection. Ballast operates at the frequency rating of 50/60-Hz. Ballast measures 16.7-Inch x 1.18-Inch x 1-Inch. Ballast is UL listed and CSA certified.