The 230mm Sunpipe Spare Diffuser by Monodraught is a double glazed ceiling diffuser designed to offer the best dispersion of natural daylight within the sunpipe. Designed to fit on the base of the sunpipe where the light exists into the room, the 230mm sunpipe diffuser spreads light throughout the room rather than focus it on a single point. This not only increases the area that natural light can reach but also prevents the creation of hotspots. Without a diffuser you will never get the full benefit out of your Monodraught Sunpipe.