Smart Lighting

The smart lighting component of the project is a combination of the solar lighting technologies provided by Parans® and Toshiba’s Light-emitting diodes (LED’s) and intelligent systems.

Smart lighting systems: aim to reduce the use of electric lighting in the buildings by introducing natural lighting and adjusting artificial lighting depending on available natural lighting.

This is to be carried out in three ways:

  1. Sunlight collector and a fiber optic system
  2. Hybrid luminaires with LED and diffusers
  3. Controllers: presence detector and light intensity


Solar Collectors and Fiber Optics

Not affected by the location of the sun, the smart receiver follows the sunlight

The sunlight collectors capture and concentrates the solar radiation to be introduced in the building. The collector tracks the sun by means of an algorithm with the local solar path and redirects it to the building by fiber optic cables.

Parans® which was founded in 2002 develops innovative hybrid solutions to maximize natural light to all indoor environments. The solar collectors can be mounted on roofs or facades and can track the sun over the full day. Specially designed optical lenses capture and concentrate the optimum amount of sunlight into the solar cable for immediate transfer to the inside of the building. This allows the transfer of controlled natural light into the building using sensors, as well as reducing the cooling requirements caused by internal gains.

Parans solar receiver solar on roof

Hybrid Luminaires

A solution that makes you less dependent on windows and their position

The company Toshiba® was established over 100 years ago in Tokyo Japan. They provide a range of products including advanced technologies in indoor lighting, by recently developing the combined LED and intelligent lighting system. LEDs are solid-state semiconductors that produce light when electricity passes through them. This means that unlike traditional incandescent lamps, they do not use a filament which burns out or overheats. The combination of solar collectors and LEDs with diffusers under the control of an intelligent lighting system greatly reduces the energy expended on lighting.

Toshiba lights


The system controller allows the indoor lighting to use minimum energy consumption.

The structure is a standard product with specific software that

  • manages the artificial lighting during the lowest sunshine hours by
  • indoor light intensity and presence detector sensor.

The selected hardware for the control system is flexible and scalable enough to handle different scenarios, from multizone scenarios where LED lighting is used in conjunction with outdoor light collectors to single-zone scenarios where simple presence base regulation is required.

The control system can be integrated with other building management systems or light controllers; it accepts users’ commands towards a web interface that can be accessed towards any web-browser.


The Prototype

Prototypes are being tested before the kit is installed into the 3 demonstration sites.

“Thanks to Toshiba, Parans and Tecnalia for all the hard work they have put into developing the lighting system in the first 18 months of the project. The first prototype is now available at the Tecnalia Kubic demo building. The sample installed during the last days of February 2015 is able to perform all the technical characteristic of the final demo kit. The experience of this sample installation will be able to speed up the project development”

The prototype of the combined sun- and artificial light fixture are ready and currently being tested at Tecnalia in Bilbao.



There is a Parans SP3-collector on the roof and a combined sun- and artificial light fixture with sensors, monitoring the light level on the inside.


The artificial light source from Toshiba is determined by the availability of natural light in the space.  Sensors monitoring the light levels feed information and input to the PCB which in turn controls the levels of dimming within the system and ultimately redicues the use or need of articifial light. See below, pictures of the prototype installation at the KUBIC building.

 parans on roof parans solar

This dark room is illuminated by a smart sunlight and artificial light controlled lighting system.  The pictures below show the inside of a room with no windows and the door was closed. Only natural lighting direct form the sun was used at the time. So imagine the energy savings by not using artificial light all the time especially in public buildings.

Borja from Tecnalia and Federico from Toshiba are no longer in the dark!

inside the kubic with light all inside the dark room!

Further testing will be carried out, but the results so far seem promising for the installation of the equipment into the demonstration buildings.