The Centium T5 electronic ballast can be used to operate either 3 or 4 F54T5HO     Delivering optimum performance, it can handle 120-277V with wire leads. The ballast is specially designed for use in environments with temperatures up to 90-degrees Celsius or 194-degrees Fahrenheit. Additional features includes a programmed start, minimum start temperature of -20-degrees Fahrenheit, maximum THD of 10%, .98 power factor, 50/60 HZ, Class A sound rating, and semi-independent or independent lamp operation.