Philips Advance Centium Electronic fluorescent ballast is suitable to use with one/two 28-Watt F28T5 lamp. It has voltage rating of 120/277-Volts and current rating of 0.23/0.55-Amp. Programmed start ballast with 1.03 ballast factor, has ignition time of 1.5 secs. It features metal T housing. Ballast accommodates solid wire of size 18-AWG. It offers 0.98 power factor. This ballast has series lamp connection. It operates at the frequency rating of 50 - 60-Hz. It measures 14.17-Inch x 1.18-Inch x 1.06-Inch. Ballast withstands temperature rating of 70 deg C. Ballast is UL listed, CSA certified, RoHS compliant and meets FCC standards.