The SRT light tunnel’s main role is the same as the SLT light tunnel’s supplying the interior with the proper amount of natural light. The SRT light tunnel has a rigid light transmitting tube, made of aluminium and covered on its surface with a silver based and light reflective (98%) layer. The inside of the tube acts like a mirror. This type of light transmitting tube ensures that daylight is conveyed in huge quantities inside the interior.
The SRT light tunnel can be used in every kind of building, but because of its high effectiveness it can be installed in buildings where the daylight is transmitted into long distances (e. g. 12m). The light tunnel SRT PLUS version may also be used at night, after installing a light bulb.