Direct sunlight piped in via fiber optics
Sunlight Direct uses a four foot wide parabolic mirror to collect sunlight, filters out the heat-causing UV light, and then pipes the remaining natural light into interior spaces via fiber optic lines. Currently the light can only be sent about 30 feet or so due to loss of light as it travels through the lines. Referred to as Hybrid Solar Lighting (HSL) because it also incoporates flourescent tubes, one HSL unit delivers 50,000 lumens, or roughly the equivalent amount of light needed to illuminate 1000 square feet.