Power Supply: Meanwell 2 x HLG-240H-C2100. This supply provides an onboard dimming function. Total LED Power: 480 Watts (560 Watts from wall socket) Total light output: 4 x 18,321 = 73,284 lumens PAR Readings (measured directly below the COB): 20cm = >2000 micromols 30cm = 1870 micromols 40cm = 1000 micromols 50cm = 630 micromols 60cm = 430 micromols Safety: The metallic body is earthed via the power supply cable. The item "Citizen CLU058 1825 LED QUAD COB Grow Light 480 Watts 3500K 90 CRI" is in sale since Saturday, September 16, 2017. This item is in the category "Garden & Patio\Hydroponics & Seed Starting\Grow Light Kits".The seller is "frankklemences" and is located in Glasgow, Glasgow (City of). This item can be shipped to all countries in Europe, United States, Canada.