... 3.High efficiency ,noiseless; 4.Longlife. 2U Energy Saving Lamp Features: 1.With excellent energy saving, 80% energy saving; 2.High luminous efficacy and less heat ... phosphor to guarantee the high light effect and improve the energy saving capacity. Application:House,hotel,office,garden,passage,mall,restaurant,etc ... screw lampholders;Not suitable for dimming. 2012 functional 2u energy saving lamp