The Fulham WorkHorse WH5-120-L is a 120v, electronic fluorescent ballast. It is approved for a variety of lamp combinations of 128w maximum. The WH5-120-L can be used with compact fluorescents CFT/4P, CFQ/4P, CFTR/4 and CFM/4P, It can be used with 2D and Circline lamps 2D/4P, CR22/4P, CR32/4P and CR40/4P. The WH5-120-L can also be used with linear T4, T5, T5HO, T8, T8HO, T10, T12 and T12HO. See WH5-120-L lamp chart under the spec sheet tab.