Cut to suit 4 foot T8 LED tubes this incredible sleeve accessory is a great choice for altering the colour of your existing lights for all kinds of events. It is very easy to install start by simply removing your LED T8 tube then slide over the coloured insert and clear sleeve then reinstall your tube. Once installed it will create a Zenith blue colour light which is Rosco colour code 195. Using the Rosco colour code allows for matching up to specific colours for future purchases and maintenance purposes. Please be aware that this item does not require end caps and is not suitable for any type of fluorescent tube.