This is a Philips 17w Ledinaire 2D LED fitting in 4000K - cool white. This product carries the usual Philips reliability and performance standards and is complete with a 3 year manufacturer warranty. These fittings have a lumen output of 1700 lumens, an average life of 30,000 hours and a beam angle of 120 degrees. They are frequently used in public buildings in areas such as corridors, staircases and walkways. The dimensions are as follows: Overall Length - 345mm Overall Width - 345mm Overall Height - 95mm Overall Diameter - 345mm