Puit de lumière avec des fibres optiques. "Bring the Sun Indoors" Latest model of the HSL 3000, mounted on a flat roof.
Dish is 4 feet in diameter, and lights 1000 square feet inside the building, minus the UV rays. Expected lifetime: 20 years. The HSL 3000, a hybrid lighting system developed by Sunlight Direct, carries the actual light of the sun indoors. The system’s 48-inch primary mirror concentrates light into a secondary mirror, which strips away the infrared and ultraviolet components, and directs the visible light into the receiver.
A tracking system has two motors governed by a GPS microprocessor, which can calculate the position of the sun within half a degree. Chris Werring's Final Report.doc.