... is 0.5-0.55mm 2.Diffuser:0.31mm Aluminum reflector ,with single parabolic blades3. Ballast: 1pc 3x14W electronic ballast,CE ... *14W,3*14W,4*14W,2*28W,3*28W Available)Application: Office, School, hospital,hotel,supermarket,tall building,municipal engineering, shopping malls etc 600*600MM T5 recessed Grille lamp(3 year ...