This is a tridonic em 34a mini basic emergency module this is a 4 cell module used for 36w f shaped compact fluorescents 18w amp 26w double turn and triple turn compact fluorescent lamps and 22w t5 circular lamps it has a 3 hour rated duration these modules are compatible with all electronic ballasts and can be used in combination with conventional magnetic control gear too the em mini range used 5 pole techonology with 4 pole lamp changeover and delayed power switching for the ballast t