leddownlight ProductFeatures: 1.savemorethan60%energycomparedwiththefluorescentlampofsamebrightness. 2.Lifespanoflightsourcereachesover50,000hours,whichisupto25timesthanthatoftraditionallamps. 3.Thelampscanradiateheatthemselvesandneedn'ttoinstallanyextraradiators. ReferenceParameters: Spec.:VKC-D11 Material:Aluminum Ratedpower:4W/6W Powerfator:0.9-0.95 Luminousflux:480lm±10% Lightsourcecolor:white(6000K±500K),warmwhite(3300K±500K) Lifespan:3years Inputvoltage:100-240VAC Certificates: CE&ROHScertificates.