SRD-_ with a rigid light transmitting.
SRD-_/L with a rigid light transmitting tube and attic illumination function.
It ensures easier use of the room located directly under the light tunnel installation site.
The new design of the light tunnel is characterised by:
The SRD light tunnel consists of a dome, three elements of light transmitting tube (SRM 61 cm), two SRK elbows*, ceiling frame, prismatic diffuser and installation kit. The total length of all light transmitting tube components in a straight line is 2.1 m (SRD 550 - 1.8 m).
* For the SRD_ 550 light tunnel, the SRK elbow available only as an option