For use with one or two high output bulbs - F48T12/HO, F60T12/HO, F72T12/HO or F96T12/HO. Minimum start temperature -20 degrees (except F96T12/HO E/S 60 degrees). 120-277 volt. UL and CSA Listed. FLUORESCENT BALLASTS CENTIUM ELECTRONIC - RAPID START SERIES LAMP CONNECTION