... T8T10,T12, it will save 35-50% electricity which save power bill by 35-50%.2. No need to change anything ... save the labor cost of Energysaving Lighting Reconstructing Program.4. Power factor improved from 0.5(traditional magnetic ballast) to 0 ... , 35WT5 will save electricity by 48% Pre heating style T5 adaptor /adapter,T5 Linear Convertor/Converter,CE ROHS,SAA Approval