... with thermal conductivety up to 220-230w/m.k, AL PCB with special design for much better heat dissipation, extent the ... the high performance of the led lamps. 3. high PF for LED tube light, LED downlight, LED flood light, LED high bay light. (PF>0 ... the color temperature, power, CRI, etc. 4. Best after sales service. Daylighting products come with a Two (2) YEAR or Three ...