This is a Powermaster 4ft Twin 36w LED Batten Fitting in cool white (4000k), designed to replace traditional 2 x 36w T8 Fluorescent tube fittings. With an average life span over 25000 hours and offers 50% energy savings significantly reducing maintenance costs. The batten also boasts a lumen output of 3200 lumens meaning it has an extremely high lumen per watt of 80. A slimline design constructed with an aluminium body, trim and opal plastic lens. The batten fittings are often used in warehouses and factories as well as being used to light indoor spaces in applications such as corridor lighting or office areas. This product comes with a 2 year warranty honoured by LampShopOnline for peace of mind.