As already mentioned, light tunnels are often the only source of natural light available to windowless rooms, filtering sunlight in from the roof space, down the highly reflective tube and finally through the diffuser fitted to the ceiling.
Most rooflights don't go much lower than 47x98cm in dimension, making sun tunnels sometimes the only appropriately sized daylight option too.
The low-key internal appearance of light tunnels is far less pronounced than with rooflights, taking up less of the ceiling area to the advantage of certain room layouts.
Externally, the low profile of sun tunnels, available from Sterlingbuild for slate or tile roofs, is preferred by many for the way the covers seamlessly sit atop the roof. Light tunnels are also undoubtedly less of a security, safety or privacy concern.
To find out more about sun tunnels, including information on best positioning, covers and quantity recommendations, check out our Sun Tunnel Buying Guide.