21w led ceiling lights: 1>Luminous flux:90-100lm/w 2>life span 50,000hours 3>material:Aluminum 21w led ceiling lights:Applications:1. Recess lighting, Shelf Lighting, Ceiling /Wall Coves2. Cabinet and under counter lighting, Office work station3. Back lighting, Step Lighting, Light boxes4. Merchandising, Exhibition stands and panelsProduct FeaturesInput VoltageAC110V;AC220VWork Frequency50- ...