Each light contains four x Sf1000 boards on a low profile heat sink with two Meanwell ELG drivers that deliver 450 watts of power that will replace a standard 600w HPS light in a 4ft x 4ft area. Using the same Meanwell drivers and Samsung diodes, they also feature a chainable dimmer, which enables a long-term connection of up to 12 units being dimmed by just one dimmer. The condition is "New sealed". If you would like to know more about LED Grow Lighting just message us.We will do our best to help. The item "SF4000 Full Spectrum LED Grow Light Samsung LM301B close to spider farmer" is in sale since Tuesday, July 20, 2021. This item is in the category "Garden & Patio\Hydroponics\Grow Lighting & Accessories\Grow Light Kits". The seller is "bruler1979_4" and is located in Rochdale. This item can be shipped to United Kingdom.