Active Fiber Optic Daylighting System

A daylighting system that delivers real, full-spectrum sunlight indoors using optical fiber transmission.

No indoor electricity consumption
No heat transfer into interior spaces
Full-spectrum natural daylight

System Overview

The system captures natural sunlight outdoors using an actively tracked solar collector and transmits the light indoors through high-purity optical fibers.

Only visible daylight is delivered indoors. Heat and infrared radiation remain outside the building envelope.

Light Output Performance

Test conditions: outdoor illuminance of 150,000 lux (clear sky, midday sunlight). Illuminance measured at defined distances from the fiber output.

Output Distance	30 m Fiber	50 m Fiber	100 m Fiber
1 m	1100 lux	823 lux	210 lux
2 m	450 lux	320 lux	80 lux
3 m	150 lux	110 lux	45 lux

Effective Daylighting Coverage

Under typical operating conditions, a single optical fiber provides effective daylighting coverage of approximately 1 m².

This corresponds to illuminance levels suitable for general daylighting and visual comfort, typically in the range of 100–300 lux.

Higher coverage may be achieved at shorter transmission distances, reduced output distances, or when lower target illuminance levels are acceptable.

Actual coverage depends on diffuser type, mounting height, fiber length, and the number of fibers installed.

Typical Applications

Basements and underground spaces
Windowless rooms
Corridors and circulation areas

Warehouses and industrial buildings
Public buildings and infrastructure
Daytime circadian-supportive environments

Technical Notes