... Aluminum+PMMA,AC100V-240V 3.Dust-Proof,Water-Proof 4.3-year warranty High Quality 4inch 5W Panel ... , water-proof .Downlights can fit different lighting application.4. External type power supplied ensure the lamp's safety ... Energy saving, environmental, radiationless.6.Different size downlights recommeded:4 inch/5inch/6inch/8inchApplicationsOffices,Shopping malls,Exhibition Gallery,Library,Factories ...