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High Voltage waterproof automatic adjustment temperature free drive LED light Feature: Average Life (hrs): 100000 Voltage:80-150V Power Tolerance: 1% LED Chip Brand: Epistar Beam Angle(°): 120°-140° Power:50W LM:4000LM Color: White Led Application: Led Floodlight DIY How to use: 1. soldering the wire to the L N point. 2. paste the thermal silicone grease to the back of LEDs. 3. install the LEDs to the heatsink or your floodlight. 4. connect to AC110V, start working. Remark: It must need a heatsink aluminum for cooling, do not light it without heatsink aluminum, Otherwise the chip will Burn Package:2pcs 50W White COB chip