This is a LED corn lamp replacement for the 18w SOX lamp. It is a BC/B22 cap and has 35,000 average life span. This has a lumen output of 1500 lumens, in 4000k this gives a vibrant cool white instead of the monochromatic yellow colour of the old SOX lamp.To install all you have to do is by pass the control gear. High quality LED lamp used for lighting in supermarkets, warehouses, gymnasiums, street lighting etc. Energy saving LED uses significantly less energy than a standard metal halide. 2 year warranty included with this product.