Supply UL (FCC) approval electronic ballast WK-T8-232/IS/120SC WK-T8-232/IS/277SC WK-T8-432/IS/120SC WK-T8-432/IS/277SC 1. UL (CUL), FCC approval 2. Life warranty: 5 years. 3. Each of them can load the following two or two tubes: F17T8, FB24T8, F25T8, F25T12, FB31T8, F32T8, F40T8.