... Extenalconstant-current supply,directed light,no dazzle,noiseless; PF≥0.9, power efficiency ... the ceiling,also can be installed on the wall or ceiling by ... for sample order, 7 to 15 days for bulk order;d) Shipping method: Courier ... led lightings, like led panel light, led grow light, led aquarium light, led street light, led floodlight, led high bay light, led tunnel light, led tubes, and other indoor led ...