The most effective way to bring natural light into a windowless interior room is tubular daylighting, which pipes sunlight from the roof through a reflective tube into rooms that no window could reach. It turns dark, artificially lit interior spaces into bright, pleasant rooms — during the day, at no running cost.
The problem with interior rooms
Interior bathrooms, corridors, storage areas and windowless offices depend on electric light around the clock. That is costly, adds heat from the fixtures, and leaves spaces feeling dim and unwelcoming.
How daylighting solves it
A tubular daylighting system reaches where windows can't. A rooftop dome captures sunlight, a reflective tube carries it down through ceilings and floors, and a diffuser spreads it across the room. One unit lights around 50–100 square metres, so even a deep interior room can be daylit. Read more on how tubular daylighting works.
Best rooms for daylighting
The strongest candidates are interior bathrooms, corridors and lobbies, storage and utility rooms, stairwells, and any windowless office or retail area. For hours after dark, pair daylighting with efficient electric lighting so the space is covered around the clock.
- Interior bathrooms and corridors
- Storage, utility and back-of-house rooms
- Windowless offices, stairwells and lobbies