... .High quality aluminium and pvc 2.CE ,Rohs dimmable led panel light suqare ceiling panel light housing * Life span : 50000hours and 3 years ... problem of lighting output caused of influenced by single faulty LED.6.No elctric wave ,conforming to CE.7.Green ... free material,conforming to RoHS.8.No RF interference. Applications: LED panel light are widely used in Hotels , Conference/Meeting room,Factories ...