... without delay,High power factor,Lumens depreciation < 5/1000 ,Eyesight protection,Specially use in long time work and study circumstances.3 ... led panel :A,DescriptionIndividually package for each LED panel.EPE Foam protection,assure the safety in the express.B,ProcedureStep 1: EPE ... Foam protect the panel.Step 2:Put the 1 pc stuff ...