... ballast,CE-EMC passed. Power factor:0.95 THD<15% 3 years warranty.4.Tube: 2 pcs T5 14W fluorescent tubes ... ,one year warranty.5.Grill Type: "I" Or "V" .6.Product ... 600*600*55MM)More other model (2*14W,3*14W,4*14W,2*28W,3*28W Available)Application: Office, School, hospital, ... engineering, shopping malls etc 600*600MM T5 recessed Grille lamp(3 year warranty)