Sky tunnel XL2 is a Tubular Day lighting device, or commonly known as Tubular Skylight. It is made up to 3 major components, roof parts, attic parts and ceiling part. This allows for the transfer of day light from above the roof to the interior of buildings, throughout the day. Sky Tunnel XL2 is very efficient in transporting natural light. Sky TunnelXL2 is fully certified Australian Standard AS4285 as well as the British Board of Agreement.