This LED tube Sleeve accessory is easy to install by slipping the clear tube and coloured filter over your existing 900mm LED tube and re-installing it into your fitting (LED tubes sold separately). It will adjust the light output of your LED to a Light Red colour (Rosco code 182). This is a brilliant way of changing the vibe of your space without expensive fittings being installed. Please be aware that this product is 3ft (900mm) in length by 32mm in diameter. It will not fit T12 type fluorescent tubes and does not come with end caps. It is also important to note that this product comes as 2 pieces a clear plastic tube and a coloured insert.